ELECTRICAL ENGINEERING PAPER-I 1. 2.

The best suitable material for the heating element is (a) Tungsten (b) Nichrome (c) Manganin Pure silicon is (a) a p-type semiconductor (c) an intrinsic semiconductor

(b) (d)

(d)

Carbon

an n-type semiconductor an extrinsic semiconductor

3.

Impurity atoms to be added to pure silicon in order to make a p-type semiconductor belongs to (a) Phosphorous (b) Boron (c) Antimony (d) Aluminium

4.

Resistivity of a wire depends upon (a) Material (b) Area

(c)

Length

(d)

All of these

5.

If a ferromagnetic material is heated upto Curie temperature, it becomes (a) Permanent magnet (b) Anti-ferromagnetic material (c) Diamagnetic material (d) Paramagnetic material

6.

At absolute zero temperature, an intrinsic semiconductor behaves as (a) a good conductor (b) a super conductor (c) an insulator (d) variable resistor

7.

In an intrinsic semiconductor the Fermi level is (a) closer to valence band. (b) closer to conduction band. (c) within the balance band. (d) midway between the valence and conduction bands.

8.

The reluctance offered by a magnetic material is highest when it is (a) Diamagnetic (b) Paramagnetic (c) Ferromagnetic (d)

None of these

9.

If temperature of a pure silicon specimen is increased, then (a) only number of free electrons increase. (b) only number of free holes increase. (c) number of free holes and free electrons increases. (d) only number of free holes decrease.

10.

Varnishes protect the insulating materials against (a) dust and oil (b) moisture, dirt and oil (c) moisture and fire hazards (d) None of the above

11.

If a 220 V heater is used on 110 V supply, the heat produced by it will be nearly (a) one half (b) twice (c) one-fourth (d) four times

12.

Two sinusoidal currents are given by following equations : π  i1 = 10 sin ωt +  3  π  i2 = 15 sin ω t – 4   The phase difference between them is (a) 105° (b) 75° (c) 15°

Series-A

2

(d)

60° KAU-07

×¾ÖªãŸÖ †×³ÖµÖÓ¡ÖÞÖ ¯ÖÏ¿®Ö¯Ö¡Ö-I 1.

ŸÖÖ¯Ö®Ö ŸÖ¢¾Ö ÆêüŸÖã ÃÖ¾ÖÖÔ׬ÖÛú ˆ¯ÖµÖãŒŸÖ ¯Ö¤üÖ£ÖÔ Æîü ™ÓüÝÙêü®Ö (b) ®ÖÖ‡ÛÎúÖê´Ö (c) ´ÖïÝÖ×®Ö®Ö (d) ÛúÖ²ÖÔ®Ö ¿Öã¨ü ×ÃÖ×»ÖÛúÖò®Ö Æîü (a) ‹Ûú p-¯ÖÏÛúÖ¸ü ÛúÖ †¨Ôü“ÖÖ»ÖÛú (b) ‹Ûú n-¯ÖÏÛúÖ¸ü ÛúÖ †¨Ôü“ÖÖ»ÖÛú (c) ‹Ûú †ÖÓŸÖ¸ü †¨Ôü“ÖÖ»ÖÛú (d) ‹Ûú ²ÖÖÊ †¨Ôü“ÖÖ»ÖÛú p-¯ÖÏÛúÖ¸ü Ûêú †¨Ôü“ÖÖ»ÖÛú ÛúÖê ²Ö®ÖÖ®Öê Ûêú ×»Ö‹ ¿Öã¨ü ×ÃÖ×»ÖÛúÖò®Ö ´Öë ×´Ö»ÖÖµÖê •ÖÖ®Öê ¾ÖÖ»Öê †¯Ö¦ü¾µÖ ¯Ö¸ü´ÖÖÞÖã ÃÖÓ²ÖÓ×¬ÖŸÖ Æïü (a) ±úÖòñúÖê¸üÃÖ ÃÖê (b) ²ÖÖê¸üÖò®Ö ÃÖê (c) ‹×®™ü´Ö®Öß ÃÖê (d) ‹»µÖã×´Ö×®ÖµÖ´Ö ÃÖê ×ÛúÃÖß ŸÖÖ¸ü Ûúß ¯ÖÏןָüÖê¬ÖÛúŸÖÖ ×®Ö³ÖÔ¸ü Ûú¸üŸÖß Æîü (a) ¯Ö¤üÖ£ÖÔ ¯Ö¸ü (b) õÖê¡Ö±ú»Ö ¯Ö¸ü (c) »Ö´²ÖÖ‡Ô ¯Ö¸ü (d) µÖê ÃÖ³Öß µÖפü »ÖÖîÆü“Öã´²ÖÛúßµÖ ¯Ö¤üÖ£ÖÔ ÛúÖê ŒµÖæ¸üß ŸÖÖ¯ÖÛÎú´Ö ŸÖÛú ÝÖ´ÖÔ ×ÛúµÖÖ •ÖÖŸÖÖ Æîü, ŸÖÖê µÖÆü ÆüÖê •ÖÖŸÖÖ Æîü (b) ¯ÖÏןֻÖÖîÆü “Öã´²ÖÛúßµÖ ¯Ö¤üÖ£ÖÔ (a) ãÖÖµÖß “Öã´²ÖÛú (c) ¯ÖÏן֓Öã´²ÖÛúßµÖ ¯Ö¤üÖ£ÖÔ (d) †®Öã“Öã´²ÖÛúßµÖ ¯Ö¤üÖ£ÖÔ ¯Ö¸ü´Ö ¿Öæ®µÖ ŸÖÖ¯ÖÛÎú´Ö ¯Ö¸ü ‹Ûú †ÖÓŸÖ¸ü (¿Öã¨ü) †¨Ôü“ÖÖ»ÖÛú ²ÖŸÖÖÔ¾Ö Ûú¸üŸÖÖ Æîü •ÖîÃÖê ×Ûú (a) ‹Ûú ÃÖã“ÖÖ»ÖÛú (b) ‹Ûú †×ŸÖ“ÖÖ»ÖÛú (c) ‹Ûú ×¾ÖªãŸÖ¸üÖê¬Öß (d) ¯Ö׸ü¾ÖŸÖÔ®ÖßµÖ ¯ÖÏןָüÖê¬ÖÛú ‹Ûú †ÖÓŸÖ¸ü (¿Öã¨ü) †¨Ôü“ÖÖ»ÖÛú ´Öë ±ú´Öá »Öê¾Ö»Ö ÆüÖêŸÖÖ Æîü (a) ÃÖÓµÖÖê•ÖÛúŸÖÖ ²Öï›ü Ûêú ÃÖ´Öß¯Ö (b) “ÖÖ»Ö®Ö ²Öï›ü Ûêú ÃÖ´Öß¯Ö (d) ÃÖÓµÖÖê•ÖÛúŸÖÖ †Öî¸ü “ÖÖ»Ö®Ö ²Öï›üÖë Ûêú ´Ö¬µÖ (c) ÃÖÓµÖÖê•ÖÛúŸÖÖ ²Öï›ü Ûêú †Ó¤ü¸ü ‹Ûú “Öã´²ÖÛúßµÖ ¯Ö¤üÖ£ÖÔ ÛúÖ ¯ÖÏןÖ™ü´³Ö †×¬ÖÛúŸÖ´Ö Æîü •Ö²Ö×Ûú µÖÆü Æîü (a) ¯ÖÏן֓Öã´²ÖÛúßµÖ (b) †®Öã“Öã´²ÖÛúßµÖ (c) »ÖÖîÆü“Öã´²ÖÛúßµÖ (d) ‡®Ö´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà µÖפü ‹Ûú ¿Öã¨ü ×ÃÖ×»ÖÛúÖò®Ö ®Ö´Öæ®Öê ÛúÖ ŸÖÖ¯ÖÛÎú´Ö ²ÖœÌüÖµÖÖ •ÖÖŸÖÖ Æîü, ŸÖÖê (a) Ûêú¾Ö»Ö þ֟ÖÓ¡Ö ‡»ÖꌙÒüÖò®ÖÖë Ûúß ÃÖÓܵÖÖ ²ÖœÌüŸÖß Æîü … (b) Ûêú¾Ö»Ö þ֟ÖÓ¡Ö ÆüÖê»ÖÖë Ûúß ÃÖÓܵÖÖ ²ÖœÌüŸÖß Æîü … (c) þ֟ÖÓ¡Ö ÆüÖê»ÖÖë †Öî¸ü þ֟ÖÓ¡Ö ‡»ÖꌙÒüÖò®ÖÖë Ûúß ÃÖÓܵÖÖ ²ÖœÌüŸÖß Æïü … (d) Ûêú¾Ö»Ö þ֟ÖÓ¡Ö ÆüÖê»ÖÖë Ûúß ÃÖÓܵÖÖ ‘Ö™üŸÖß Æîü … ¾ÖÖÙ®Ö¿Ö ×¾ÖªãŸÖ¸üÖê¬Öß ¯Ö¤üÖ£ÖÖí Ûúß ÃÖã¸üõÖÖ Ûú¸üŸÖß Æîü ×¾Ö¹ý¨ü (b) ®Ö´Öß, ´Öî»Ö †Öî¸ü ŸÖê»Ö Ûêú (a) ¬Öæ»Ö †Öî¸ü ŸÖê»Ö Ûêú (c) ®Ö´Öß †Öî¸ü †×Ý®Ö ÃÖÓÛú™ü Ûêú (d) ˆ¯ÖµÖãÔŒŸÖ ´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà µÖפü ‹Ûú 220 V Æüß™ü¸ü 110 V ¯ÖϤüÖµÖ ¯Ö¸ü ¯ÖϵÖÖêÝÖ ×ÛúµÖÖ •ÖÖŸÖÖ Æîü, ŸÖÖê ‡ÃÖÛêú «üÖ¸üÖ ˆŸ¯Ö®®Ö ‰ú´ÖÖ »ÖÝÖ³ÖÝÖ ÆüÖêÝÖß (a) †Ö¬Öß (b) ¤ãüÝÖã®Öß (c) ‹Ûú-“ÖÖî£ÖÖ‡Ô (d) “ÖÖ¸ü ÝÖã®Öß ¤üÖê •µÖÖ¾ÖÛÎúßµÖ ¬ÖÖ¸üÖ‹Ñ ×®Ö´®Ö×»Ö×ÜÖŸÖ ÃÖ´ÖßÛú¸üÞÖÖë «üÖ¸üÖ ¤üß •ÖÖŸÖß ÆîÓü : (a)

2.

3. 4. 5.

6. 7.

8. 9.

10.

11. 12.

π  i1 = 10 sin ωt + 3    π  i2 = 15 sin ωt – 4  

ˆ®ÖÛêú ²Öß“Ö Ûú»ÖÖ †ÓŸÖ¸ü Æîü (a) KAU-07

105°

(b)

75°

(c) 3

15°

(d)

60° Series-A

13.

The reactance offered by a capacitor to an alternating current of frequency 50 Hz is 10 ohm. If frequency is increased to 100 Hz, the reactance will be (a) 2.5 ohm (b) 5.0 ohm (c) 20.0 ohm (d) 40.0 ohm

14.

The r.m.s. value of a half-wave rectified alternating current is 10 A. Its value for full-wave rectification will be 20 40 20 A (b) A (c) A (d) 20 A (a) π π 2

15.

In the following figure, the resistance measured across A and B will be

(a) 16.

5 kΩ

(b)

10 kΩ

(c)

15kΩ

(d)

20 kΩ

(d)

300 V

In the following figure, the voltage across C1 will be

(a)

100 V

(b)

200 V

(c)

150 V

17.

π  An alternating current given by i = 14.14 sin ωt + 6 has an r.m.s. value of   (a) 1.96 A (b) 7.07 A (c) 10.0 A (d) 14.14 A

18.

In the following figure, resistor R2 becomes open circuited, the reading of voltmeter will be

19. 20. 21.

(a) zero (b) 50 V (c) 150 V (d) 200 V The capacity of a battery is measured in (a) Watts (b) Watt-hours (c) Amperes (d) Ampere-hours If both the number of turns and core length of an inductive coil are doubled, then its self inductance will be (a) halved (b) doubled (c) quadrupled (d) unaffected Mutual inductance between two magnetically coupled coils depends on (a) number of turns only (b) permeability of the core only (c) cross-sectional area of their common core only (d) All of the above

Series-A

4

KAU-07

13.

14.

‹Ûú ¬ÖÖ׸ü¡Ö «üÖ¸üÖ 50 Hz †Ö¾Öé×¢Ö Ûúß ¯ÖÏŸµÖÖ¾ÖŸÖá ¬ÖÖ¸üÖ ¯Ö¸ü ¯ÖÏן֑ÖÖŸÖ 10 †Öê´Ö פüµÖÖ •ÖÖŸÖÖ Æîü … µÖפü †Ö¾Öé×¢Ö 100 Hz ŸÖÛú ²ÖœÌüÖ‡Ô •ÖÖŸÖß Æîü, ŸÖÖê ¯ÖÏן֑ÖÖŸÖ ÆüÖêÝÖÖ (a) 2.5 †Öê´Ö (b) 5.0 †Öê´Ö (c) 20.0 †Öê´Ö (d) 40.0 †Öê´Ö ‹Ûú †¨Ôü ŸÖ¸ÓüÝÖ ×¤ü™üÛúÖ׸üŸÖ ¯ÖÏŸµÖÖ¾ÖŸÖá ¬ÖÖ¸üÖ ÛúÖ ¾Ö.´ÖÖ. ´Öæ»Ö ´ÖÖ®Ö 10 A Æîü … ‡ÃÖÛúÖ ´ÖÖ®Ö ¯ÖæÞÖÔ ŸÖ¸ÓüÝÖ ×¤ü™üÛú¸üÞÖ Ûêú ×»Ö‹ ÆüÖêÝÖÖ : (a)

15.

18.

40 A π

(c)

20 A 2

(d)

20 A

5 kΩ

(b)

10 kΩ

(c)

15 kΩ

(d)

20 kΩ

×®Ö´®Ö×»Ö×ÜÖŸÖ ×“Ö¡Ö ´Öë C1 Ûêú ×ÃÖ¸üÖë ¯Ö¸ü ¾ÖÖê»™êü•Ö ÆüÖêÝÖÖ :

(a)

17.

(b)

×®Ö´®Ö×»Ö×ÜÖŸÖ ×“Ö¡Ö ´Öë A †Öî¸ü B Ûêú ´Ö¬µÖ ´ÖÖ×¯ÖŸÖ ¯ÖÏןָüÖê¬Ö ÆüÖêÝÖÖ :

(a) 16.

20 A π

100 V

(b)

200 V (c) 150 V (d) 300 V π ‹Ûú ¯ÖÏŸµÖÖ¾ÖŸÖá ¬ÖÖ¸üÖ •ÖÖê i = 14.14 sin ωt + 6 «üÖ¸üÖ ¤üß •ÖÖŸÖß Æîü ÛúÖ ¾Ö.´ÖÖ.´Öæ. ´ÖÖ®Ö Æîü (a) 1.96 A (b) 7.07 A (c) 10.0 A (d) 14.14 A ×®Ö´®Ö×»Ö×ÜÖŸÖ ×“Ö¡Ö ´Öë ¯ÖÏןָüÖê¬ÖÛú R2 ÜÖã»ÖÖ ¯Ö׸ü¯Ö×£ÖŸÖ ÆüÖê •ÖÖŸÖÖ Æîü, ¾ÖÖê»™ü´Öß™ü¸ü ÛúÖ ¯ÖÖšËüµÖÖÓÛú ÆüÖêÝÖÖ :

¿Öæ®µÖ (b) 50 V (c) 150 V (d) 200 V ×ÛúÃÖß ²Öî™ü¸üß Ûúß õÖ´ÖŸÖÖ ´ÖÖ¯Öß •ÖÖŸÖß Æîü (b) ¾ÖÖ™ü-‘ÖÓ™êü ´Öë (c) ‹×´¯ÖµÖ¸ü ´Öë (d) ‹×´¯ÖµÖ¸ü-‘ÖÓ™êü ´Öë (a) ¾ÖÖ™ü ´Öë µÖפü ‹Ûú ¯ÖÏê¸üÞÖ ÛãÓú›ü»Öß Ûúß ™ü®ÖÔ ÃÖÓܵÖÖ †Öî¸ü ÛúÖê¸ü »Ö´²ÖÖ‡Ô ¤üÖê®ÖÖë ¤ãüÝÖã®Öß Ûú¸ü ¤üß •ÖÖŸÖß Æîü, ŸÖÖê ‡ÃÖÛúÖ Ã¾ÖµÖÓ ¯ÖÏê¸üÛúŸ¾Ö ÆüÖêÝÖÖ : (a) †Ö¬ÖÖ (b) ¤ãüÝÖã®ÖÖ (c) “ÖÖîÝÖã®ÖÖ (d) †¯ÖϳÖÖ×¾ÖŸÖ ¤üÖê “Öã´²ÖÛúßµÖ µÖãÝ´Ö ÛãÓú›ü×»ÖµÖÖë Ûêú ²Öß“Ö †®µÖÖê®µÖ ¯ÖÏê¸üÛúŸ¾Ö ×®Ö³ÖÔ¸ü Ûú¸üŸÖÖ Æîü (a) Ûêú¾Ö»Ö ™ü®ÖÔ Ûúß ÃÖÓܵÖÖ ¯Ö¸ü (b) Ûêú¾Ö»Ö ÛÎúÖê›ü Ûúß ¯ÖÖ¸üÝÖ´µÖŸÖÖ ¯Ö¸ü (c) Ûêú¾Ö»Ö †¯Ö®Öê ˆ³ÖµÖ×®Öšü ÛÎúÖê›ü Ûêú †®Öã¯ÖÏãÖ-ÛúÖ™ü õÖê¡Ö±ú»Ö ¯Ö¸ü (d) ˆ¯ÖµÖãÔŒŸÖ ÃÖ³Öß ¯Ö¸ü (a)

19. 20. 21.

KAU-07

5

Series-A

22.

23.

24.

For sinusoidal waveform, the ratio of average value to r.m.s. value is 2π 2 2 2 π (a) (b) (c) (d) 2 π 2π 2 2 For an RLC series AC circuit, the current at series resistance is (a) maximum at lagging power factor (b) maximum at leading power factor (c) maximum at unity power factor (d) minimum at unity power factor If v = (a + jb) and i = (c + jd), then active power is given by (a) ac + ad (b) ac + bd (c) bc – bd

(d)

ad + bc

25.

The voltage phasor of a circuit is 10 ∠15° V and current phasor is 2 ∠–45° A. The reactive power in the circuit will be (a) 17.32 VAR (b) 10 2 VAR (c) 8.66 VAR (d) None of these

26.

If a capacitance is charged by a square wave current source, then the voltage across the capacitor will be (a) Square wave (b) Step function (c) Triangular wave (d) Zero In the circuit shown below, the terminals A and B are short circuited, the current drawn from the battery is

27.

V 2V V (b) (c) (d) zero R R 2R In the following circuit, the equivalent capacitance between terminals A and B is (a)

28.

(a) 29.

30.

31. 32.

C 2

(b)

2 3C

(c)

C

(d)

3C

The output voltage of a battery drops from 100 V with zero load current to 80 V when load current is 2 A. The internal resistance of the battery is (a) 10 Ω (b) 20 Ω (c) 40 Ω (d) 50 Ω A charge of 0.1 coulomb moves through a given point in every 0.05 seconds. The current flowing through the point is (a) 2 mA (b) 5 mA (c) 2 A (d) 5 A Which of the following capacitors are used in D.C. circuits ? (a) Mica (b) Air (c) Ceramic (d) Electrolytic In an RLC series AC circuit, if frequency is below the resonant frequency, then (a) XC = XL (b) XC < XL (c) XC > XL (d) None of these

Series-A

6

KAU-07

22.

×ÛúÃÖß •µÖÖ¾ÖÛÎúßµÖ ŸÖ¸ÓüÝÖÖÛéú×ŸÖ ´Öë †ÖîÃÖŸÖ ´ÖÖ®Ö ÛúÖ ¾Ö.´ÖÖ.´Öæ. ´ÖÖ®Ö ÃÖê †®Öã¯ÖÖŸÖ Æîü (a)

23.

24.

26. 27.

32.

2 2π

(d)

2 2 π

(b)

ac + bd

(c)

bc – bd

(d)

ad + bc

V R

(b)

2V R

(c)

V 2R

(d)

¿Ö段Ö

C 2

(b)

2 3C

(c)

10 Ω

(b)

20 Ω

V (c)

C

(d)

3C

ÃÖê •Ö²Ö ³ÖÖ¸ü ¬ÖÖ¸üÖ 2 40 Ω

A

Æîü ‘Ö™üÛú¸ü 80 (d)

V

ÆüÖê •ÖÖŸÖÖ Æîü …

50 Ω

‹Ûú 0.1 Ûæú»Ö´²Ö ÛúÖ †Ö¾Öê¿Ö ‹Ûú פüµÖê ÝÖµÖê ײ֮¤ãü Ûêú «üÖ¸üÖ ¯ÖÏŸµÖêÛú 0.05 ÃÖêÛúÓ ›ü ´Öë ÝÖã•Ö¸üŸÖÖ Æîü … ײ֮¤ãü ÃÖê ¯ÖϾÖÖ×ÆüŸÖ ¬ÖÖ¸üÖ Æîü (a)

31.

ac + ad

×ÛúÃÖß ²Öî™ü¸üß ÛúÖ ×®ÖÝÖÔŸÖ ¾ÖÖê»™êü•Ö ¿Öæ®µÖ ³ÖÖ¸ü ¬ÖÖ¸üÖ ¯Ö¸ü 100 ²Öî™ü¸üß ÛúÖ †ÖÓŸÖ׸üÛú ¯ÖÏןָüÖê¬Ö Æîü (a)

30.

(c)

×®Ö´®Ö×»Ö×ÜÖŸÖ ¯Ö׸ü¯Ö£Ö ´Öë A †Öî¸ü B ×ÃÖ¸üÖë Ûêú ²Öß“Ö ÃÖ´ÖŸÖã»µÖ ¬ÖÖ׸üŸÖÖ Æî :ü

(a) 29.

2π 2

×ÛúÃÖß ¯Ö׸ü¯Ö£Ö ÛúÖ ¾ÖÖê»™êü•Ö ±êú•Ö̸ü 10 ∠15° V Æîü †Öî¸ü ¬ÖÖ¸üÖ ±êú•Ö͸ü 2 ∠– 45° A Æîü … ¯Ö׸ü¯Ö£Ö ´Öë ¯ÖÏן֑ÖÖŸÖßµÖ ¿Ö׌ŸÖ ÆüÖêÝÖß (a) 17.32 VAR (b) 10 2 VAR (c) 8.66 VAR (d) ‡®Ö´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà µÖפü ‹Ûú ÃÖÓ¬ÖÖ׸ü¡Ö ¾ÖÝÖÖÔÛúÖ¸ü ŸÖ¸ÓüÝÖ ¬ÖÖ¸üÖ ÄÖÖêŸÖ ÃÖê †Ö¾Öê×¿ÖŸÖ ×ÛúµÖÖ •ÖÖŸÖÖ Æîü, ŸÖÖê ÃÖÓ¬ÖÖ׸ü¡Ö Ûêú ׿ָüÖë ¯Ö¸ü ¾ÖÖê»™êü•Ö ÆüÖêÝÖÖ (a) ¾ÖÝÖÖÔÛúÖ¸ü ŸÖ¸ÓüÝÖ (b) ¯Ö¤ü ±ú»Ö®Ö (c) סֳÖã•ÖÖÛúÖ¸ü ŸÖ¸ÓüÝÖ (d) ¿Öæ®µÖ ®Öß“Öê ¤ü¿ÖÖÔµÖê ÝÖµÖê ¯Ö׸ü¯Ö£Ö ´Öë A †Öî¸ü B ×ÃÖ¸êü »Ö‘Öã¯Ö׸ü¯Ö×£ÖŸÖ ×ÛúµÖê •ÖÖŸÖê Æïü, ²Öî™ü¸üß ÃÖê »Öß ÝÖµÖß ¬ÖÖ¸üÖ Æîü :

(a) 28.

2 2

(b)

‹Ûú RLC ÁÖêÞÖß ¯ÖÏ.¬ÖÖ. ¯Ö׸ü¯Ö£Ö Ûêú ×»ÖµÖê ÁÖêÞÖß †®Öã®ÖÖ¤ü ¯Ö¸ü ¬ÖÖ¸üÖ Æîü (a) †×¬ÖÛúŸÖ´Ö ¯Ö¿“ÖÝÖÖ´Öß ¿Ö׌ŸÖ ÝÖãÞÖÖÓÛú ¯Ö¸ü (b) †×¬ÖÛúŸÖ´Ö †ÝÖÏÝÖÖ´Öß ¿Ö׌ŸÖ ÝÖãÞÖÖÓÛú ¯Ö¸ü (c) †×¬ÖÛúŸÖ´Ö ‡ÛúÖ‡Ô ¿Ö׌ŸÖ ÝÖãÞÖÖÓÛú ¯Ö¸ü (d) ®µÖæ®ÖŸÖ´Ö ‡ÛúÖ‡Ô ¿Ö׌ŸÖ ÝÖãÞÖÖÓÛú ¯Ö¸ü µÖפü v = (a + jb) †Öî¸ü i = (c + jd) ŸÖÖê ×ÛÎúµÖÖ¿Öᯙ ¿Ö׌ŸÖ ¤üß •ÖÖŸÖß Æîü (a)

25.

π

(d)

5A

×®Ö´®Ö×»Ö×ÜÖŸÖ ÃÖÓ¬ÖÖ׸ü¡ÖÖë ´Öë ÃÖê ÛúÖî®Ö ÃÖÖ ×¤ü.¬ÖÖ. ¯Ö׸ü¯Ö£ÖÖë ´Öë ¯ÖϵÖÖêÝÖ ×ÛúµÖÖ •ÖÖŸÖÖ Æîü ? (a) ´ÖÖ‡ÛúÖ (†³ÖÏÛú) (b) ¾ÖÖµÖã (c) ×ÃÖ¸êü×´ÖÛú ‹Ûú RLC ÁÖêÞÖß ¯ÖÏ.¬ÖÖ. ¯Ö׸ü¯Ö£Ö ´Öë, µÖפü †Ö¾Öé×¢Ö †®Öã®ÖÖ¤üß †Ö¾Ö×¢Ö ÃÖê Ûú´Ö Æîü ŸÖÖê

(d)

†¯Ö‘Ö™ËüµÖ (‡»ÖꌙÒüÖê»ÖÖ‡™ü)

(a)

(d)

‡®Ö´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà

KAU-07

2 mA

XC = XL

(b)

(b)

5 mA

(c)

XC < XL

(c)

7

2A

XC > XL

Series-A

33.

An R-L series AC circuit has R = 10 ohm and XL = 10 ohm. It is connected to an AC voltage source, the phase angle between voltage and current is (a) 30° (b) 45° (c) 60° (d) 36.8°

34.

The current I flowing in the following circuit is

(a)

zero

(b)

1A

(c)

–1 A

(d)

10 A 3

35.

The capacitance of a capacitor is not affected by (a) Plate area (b) Plate separation (c) Nature of dielectric (d) Plate thickness

36.

A 220 V, 200 W bulb and a 220 V, 100 W bulb are connected in series across a 220 V supply, the power consumed by them will be (a) 33.3 W (b) 66.6 W (c) 100 W (d) 300 W The direction of inducted e.m.f. can be found with the help of (a) Fleming’s right hand rule (b) Kirchhoff’s voltage law (c) Lenz’s law (d) Laplace’s law

37.

38.

If 1 ampere current is flowing through a 100 mH coil, then energy stored in the coil is (a) 0.05 Joules (b) 0.5 Joules (c) 5.0 Joules (d) None of these

39.

In the following figure, the equivalent resistance at terminals A and B will be

(a)

275 Ω

(b)

180 Ω

(c)

118.75 Ω

(d)

None of these

40.

The maximum power dissipation in a resistance from a battery of electromotive force ‘E’ and internal resistance ‘r’ will be E2 E2 E2 E2 (a) 8r (b) 4r (c) 2r (d) r

41.

Two heater wires of equal length are connected first in series and then in parallel. The ratio of heat generated from series to parallel connection will be (a) 4 : 1 (b) 2 : 1 (c) 1 : 2 (d) 1 : 4

42.

When the current in a coil is increased from 2 A to 4 A in 0.05 seconds, the e.m.f. induced in the coil is 8 V. The self inductance of the coil is (a) 0.8 H (b) 0.4 H (c) 0.2 H (d) 0.1 H

43.

The induced e.m.f. will be maximum when a conductor cuts the magnetic field at an angle of (a) 15° (b) 30° (c) 45° (d) 90°

Series-A

8

KAU-07

33.

‹Ûú R-L ÁÖêÞÖß ¯ÖÏ.¬ÖÖ. ¯Ö׸ü¯Ö£Ö ´Öë R = 10 †Öê´Ö †Öî¸ü XL = 10 †Öê´Ö Æîü … µÖÆü ‹Ûú ¯ÖÏ.¬ÖÖ. ¾ÖÖê»™êü•Ö ÄÖÖêŸÖ ÃÖê ÃÖÓµÖÖê×•ÖŸÖ ×ÛúµÖÖ •ÖÖŸÖÖ Æîü … ¾ÖÖê»™êü•Ö †Öî¸ü ¬ÖÖ¸üÖ Ûêú ²Öß“Ö Ûú»ÖÖ®ŸÖ¸ü Æîü (a)

34.

36.

(b)

45°

(c)

60°

(d)

36.8°

(c)

–1 A

(d)

10 A 3

×®Ö´®Ö×»Ö×ÜÖŸÖ ¯Ö׸ü¯Ö£Ö ´Öë ¯ÖϾÖÖ×ÆüŸÖ ¬ÖÖ¸üÖ I Æîü :

(a) 35.

30°

¿Ö段Ö

(b)

1A

‹Ûú ÃÖÓ¬ÖÖ׸ü¡Ö Ûúß ¬ÖÖ׸üŸÖÖ ¯ÖϳÖÖ×¾ÖŸÖ ®ÖÆüà ÆüÖêŸÖß Æîü (a) ¯»Öê™ü õÖê¡Ö±ú»Ö ÃÖê (b) ¯»Öê™ü †ÓŸÖ¸üÖ»Ö ÃÖê (d) ¯»Öê™ü Ûúß ´ÖÖê™üÖ‡Ô ÃÖê (c) ¯Ö¸üÖ¾ÖîªãŸÖ Ûúß ¯ÖÏÛéú×ŸÖ ÃÖê ‹Ûú 220 V, 200 W ²Ö»²Ö †Öî¸ü ‹Ûú 220 V, 100 W ²Ö»²Ö 220 V ¯ÖϤüÖµÖ ÃÖê ÁÖêÞÖß ´Öë ÃÖÓµÖÖê×•ÖŸÖ ×ÛúµÖê •ÖÖŸÖê Æïü , ˆ®ÖÛêú «üÖ¸üÖ ˆ¯ÖµÖãŒŸÖ ¿Ö׌ŸÖ ÆüÖêÝÖß (a)

33.3 W

(b)

66.6 W

(c)

100 W

(d)

300 W

39.

¯ÖÏê׸üŸÖ ×¾Ö.¾ÖÖ.²Ö Ûúß ×¤ü¿ÖÖ ¯ÖÏÖ¯ŸÖ Ûúß •ÖÖ ÃÖÛúŸÖß Æîü ÃÖÆüÖµÖŸÖÖ ÃÖê (a) °»ÖêØ´ÖÝÖ Ûêú ¤üÖ×Æü®Öê ÆüÖ£Ö Ûêú ×®ÖµÖ´Ö (b) ×Ûú¸ü“ÖÖî±ú Ûêú ¾ÖÖê»™êü•Ö ×®ÖµÖ´Ö (d) »ÖÖ¯»ÖÖÃÖ Ûêú ×®ÖµÖ´Ö (c) »Öë•Ö Ûêú ×®ÖµÖ´Ö µÖפü 1 ‹×´¯ÖµÖ¸ü ¬ÖÖ¸üÖ 100 mH ÛãÓú›ü»Öß Ûêú «üÖ¸üÖ ¯ÖϾÖÖ×ÆüŸÖ Ûúß •ÖÖŸÖß Æîü, ŸÖÖê ÛãÓú›ü»Öß ´Öë ÃÖÓ“Ö×µÖŸÖ ‰ú•ÖÖÔ Æîü (a) 0.05 •Öæ»Ö (b) 0.5 •Öæ»Ö (c) 5.0 •Öæ»Ö (d) ‡®Ö´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà ×®Ö´®Ö×»Ö×ÜÖŸÖ ×“Ö¡Ö ´Öë A †Öî¸ü B ׿ָüÖë ¯Ö¸ü ÃÖ´ÖŸÖã»µÖ ¯ÖÏןָüÖê¬Ö ÆüÖêÝÖÖ :

40.

‡®Ö´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà ×¾ÖªãŸÖ ¾ÖÖÆüÛú ²Ö»Ö ‘E’ †Öî¸ü †ÖÓŸÖ׸üÛú ¯ÖÏןָüÖê¬Ö ‘r’ ¾ÖÖ»Öß ‹Ûú ²Öî™ü¸üß ÃÖê ×ÛúÃÖß ¯ÖÏןָüÖê¬Ö ´Öë †×¬ÖÛúŸÖ´Ö ¿Ö׌ŸÖ õÖµÖ ÆüÖêÝÖÖ

37.

38.

41.

(a)

275 Ω

(b)

180 Ω

(c)

118.75 Ω

(d)

(a)

E2 8r

(b)

E2 4r

(c)

E2 2r

(d)

‹ÛúÃÖ´ÖÖ®Ö »Ö´²ÖÖ‡Ô Ûêú ¤üÖê ŸÖÖ¯ÖÛú ŸÖÖ¸ü ¯ÖÆü»Öê ÁÖêÞÖß ´Öë †Öî¸ü ²ÖÖ¤ü ´Öë ÃÖ´ÖÖÓŸÖ¸ü ÛÎú´Ö ´Öë ÃÖÓµÖÖê×•ÖŸÖ ×ÛúµÖê •ÖÖŸÖê Æïü … ÁÖêÞÖß ÃÖê ÃÖ´ÖÖÓŸÖ¸ü ÛÎú´Ö Ûêú ÃÖÓµÖÖê•Ö®Ö ´Öë ˆŸ¯Ö®®Ö ‰ú´ÖÖ ÛúÖ †®Öã¯ÖÖŸÖ ÆüÖêÝÖÖ (a)

42.

4:1

(b) 2 : 1 0.05 ÃÖêÛÓú›ü ´Öë 2 A

‹Ûú ÛãÓú›ü»Öß ´Öë •Ö²Ö ¬ÖÖ¸üÖ •ÖÖŸÖÖ Æîü … ÛãÓú›ü»Öß ÛúÖ Ã¾Ö-¯ÖÏê¸üÛúŸ¾Ö Æîü (a)

43.

E2 r

0.8 H

(b)

(c)

ÃÖê 4

A

0.4 H

1:2

(d)

ŸÖÛú ²ÖœÌüÖ‡Ô •ÖÖŸÖß Æîü, ŸÖÖê ÛãÓú›ü»Öß ´Öë ¯ÖÏê׸üŸÖ ×¾Ö.¾ÖÖ.²Ö. 8 (c)

0.2 H

(d)

¯ÖÏê׸üŸÖ ×¾Ö.¾ÖÖ.²Ö. †×¬ÖÛúŸÖ´Ö ÆüÖêÝÖÖ •Ö²Ö ‹Ûú “ÖÖ»ÖÛú “Öã´²ÖÛúßµÖ õÖê¡Ö ÛúÖê ÛúÖ™üŸÖÖ Æîü ‹Ûú ÛúÖêÞÖ (a) 15° ÃÖê (b) 30° ÃÖê (c) 45° ÃÖê (d)

KAU-07

9

1:4 V

ÆüÖê,

0.1 H 90°

ÃÖê Series-A

44.

A delta connected load with resistance of 6 ohm and inductive reactance of 8 ohm in each phase is supplied by a 3-phase, 400 V, 50 Hz, AC supply. The value of total power drawn by the load is (a) 28.8 kW (b) 14.0 kW (c) 10.8 kW (d) 52.0 kW

45.

The frequency of voltage generated in a 4-pole alternator rotating at 1800 r.p.m. is (a) 25 Hz (b) 30 Hz (c) 60 Hz (d) None of these

46.

A 50 Hz alternator will run at the highest speed if it is wound for (a) 8 poles (b) 6 poles (c) 4 poles (d)

2 poles

47.

A transformer having 1000 turns in primary winding is connected to a single phase 250 V a.c. supply. For inducing 400 V in secondary winding, the number of turns in secondary winding must be (a) 1600 (b) 1250 (c) 400 (d) 250

48.

The field poles and armature core of a d.c. generator are laminated in order to reduce (a) Hysteresis loss (b) Eddy current loss (c) Weight (d) Speed

49.

Which one of the following methods gives voltage regulation higher than the actual value in an alternator ? (a) ZPF method (b) mmf method (c) emf method (d) ASA method

50.

If speed of a d.c. shunt motor is increased above the rated speed, then the counter e.m.f. (a) increases (b) decreases (c) remains unchanged (d) first increases and then decreases

51.

The open current test in a transformer gives (a) iron losses (b) copper losses (c)

friction losses (d)

total losses

52.

The mechanical power developed in a d.c. motor is equal to (a) power input – core losses (b) power input – mechanical losses (c) Armature current × counter e.m.f. (d) Armature current × supply voltage

53.

An electric train employing a d.c. series motor is running at a fixed speed. When a sudden drop in voltage of supply takes place, then this results in (a) drop in speed and rise in current. (b) rise in speed and drop in current. (c) rise in speed and rise in current. (d) drop in speed with current unaltered.

54.

A 220 V dc shunt motor is running at 500 rpm when armature current is 50 A. The value of armature resistance is 0.2 ohm. The speed of motor at the double torque will be (a) 250 rpm (b) 500 rpm (c) 1000 rpm (d) 476 rpm

55.

A 10 kVA 220 V/220 V, 50 Hz transformer shows 340 W in short circuit test and 168 W in open circuit test. Its efficiency at full load and 0.8 power factor lagging is approximately (a) 92% (b) 94% (c) 96% (d) 98%

56.

If number of poles in lap wound d.c. generator are doubled, the generated e.m.f. will be (a) increased by a factor of 2 (b) decreased by a factor of 2 (c) increased by a factor of 4 (d) unchanged

57.

A d.c. series motor has linear magnetization characteristics and negligible armature resistance. The motor speed is (a) directly proportional to T (b) inversely proportional to T (c) directly proportional to T (d) inversely proportional to T where T = load torque

Series-A

10

KAU-07

44.

‹Ûú ›êü»™üÖ ÃÖÓµÖÖê×•ÖŸÖ ³ÖÖ¸ü וÖÃÖÛêú ¯ÖÏŸµÖêÛú Ûú»ÖÖ ´Öë 6 †Öê´Ö ¯ÖÏןָüÖê¬Ö †Öî¸ü 8 †Öê´Ö ¯ÖÏê¸üÛúŸ¾ÖßµÖ ¯ÖÏן֑ÖÖŸÖ Æîü ‹Ûú סÖÛú»ÖÖ ÃÖê †Ö¯ÖæÙŸÖŸÖ ×ÛúµÖÖ •ÖÖŸÖÖ Æîü … ³ÖÖ¸ü «üÖ¸üÖ »Öß ÝÖµÖß Ûãú»Ö ¿Ö׌ŸÖ ÛúÖ ´ÖÖ®Ö Æîü

400 V, 50 Hz, ¯ÖϤüÖµÖ (a) 28.8 kW 45.

47.

49. 50.

51. 52.

53.

54.

(c)

10.8 kW

(d)

52.0 kW

25 Hz

(b)

30 Hz

(c)

60 Hz

(d)

‡®Ö´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà

‹Ûú 50 Hz ¯ÖÏŸµÖÖ¾ÖŸÖÔÛú ˆ““ÖŸÖ´Ö “ÖÖ»Ö ¯Ö¸ü “Ö»ÖêÝÖÖ µÖפü µÖÆü ¾ÖêךüŸÖ ×ÛúµÖÖ •ÖÖŸÖÖ Æîü (a) 8 ¬ÖÐã¾Ö ÃÖê (b) 6 ¬ÖÐã¾Ö ÃÖê (c) 4 ¬ÖÐã¾Ö ÃÖê (d) 2 ¬ÖÐã¾Ö ÃÖê ‹Ûú ™ÒüÖÓñúÖò´ÖÔ¸ü וÖÃÖÛêú ¯ÖÏÖ£Ö×´ÖÛú ¾Öêšü®Ö ´Öë 1000 ™ü®ÖÔ Æîü ‹Ûú 250 V ‹Ûú»Ö Ûú»ÖÖ ¯ÖÏ.¬ÖÖ. ¯ÖϤüÖµÖ ÃÖê ÃÖÓµÖÖê×•ÖŸÖ ×ÛúµÖÖ •ÖÖŸÖÖ Æîü … ׫üŸÖßµÖÛú ¾Öêšü®Ö ´Öë 400 V ¯ÖÏê׸üŸÖ Ûú¸ü®Öê Ûêú ×»ÖµÖê ׫üŸÖßµÖÛú ¾Öêšü®Ö ´Öë ™ü®ÖÔ Ûúß ÃÖÓܵÖÖ ÆüÖê®Öß “ÖÖ×Æü‹ (a)

48.

14.0 kW

‹Ûú 4-¬ÖÐã¾Ö ¯ÖÏŸµÖÖ¾ÖŸÖÔÛú Ûêú 1800 “Ö.¯ÖÏ.×´Ö. ¯Ö¸ü ‘ÖæÞÖÔ®Ö Ûú¸ü®Öê ¯Ö¸ü ˆŸ¯Ö®®Ö ¾ÖÖê»™êü•Ö Ûúß †Ö¾Öé×¢Ö Æîü (a)

46.

(b)

1600

(b)

1250

(c)

400

(d)

250

‹Ûú פü.¬ÖÖ. •Ö×®Ö¡Ö Ûêú õÖê¡Ö ¬ÖÐã¾Ö †Öî¸ü †Ö´Öì“Ö¸ü ÛÎúÖê›ü ¯Ö™ü×»ÖŸÖ ×ÛúµÖê •ÖÖŸÖê ÆîÓü ‘Ö™üÖ®Öê Ûêú ×»Ö‹ (a) ¿Öî×£Ö»µÖ ÆüÖ×®Ö (b) ³ÖѾָü ¬ÖÖ¸üÖ ÆüÖ×®Ö (c) ³ÖÖ¸ (d) “ÖÖ»Ö ‹Ûú ¯ÖÏŸµÖÖ¾ÖŸÖÔÛú ´Öë ×®Ö´®Ö ×¾Ö׬ֵÖÖë ´Öë ÃÖê ÛúÖî®Ö ÃÖß ¾ÖÖßÖ×¾ÖÛú ´ÖÖ®Ö ÃÖê †×¬ÖÛú ¾ÖÖê»™êü•Ö ×®ÖµÖ´Ö®Ö ¤êüŸÖß Æîü ? (a) ZPF ×¾Ö×¬Ö (b) mmf ×¾Ö×¬Ö (c) emf ×¾Ö×¬Ö (d) ASA ×¾Ö×¬Ö µÖפü ‹Ûú פü.¬ÖÖ. ¿ÖÓ™ü ´ÖÖê™ü¸ü Ûúß “ÖÖ»Ö ÃÖÓ×®Ö¬ÖÖÔ׸ŸÖ “ÖÖ»Ö ÃÖê ‰ú¯Ö¸ü ²ÖœÌüÖ‡Ô •ÖÖŸÖß Æîü, ŸÖÖê ¯ÖÏןֳÖÖÝÖ ×¾Ö.¾ÖÖ.²Ö»Ö (a) ²ÖœÌüŸÖÖ Æîü … (b) ‘Ö™üŸÖÖ Æîü … (d) ¯ÖÆü»Öê ²ÖœÌüŸÖÖ Æîü †Öî¸ü ŸÖ²Ö ‘Ö™üŸÖÖ Æîü … (c) †¯Ö׸ü¾ÖÙŸÖŸÖ ¸üÆüŸÖÖ Æîü … ×ÛúÃÖß ™ÒüÖÓñúÖò´ÖÔ¸ü ´Öë ÜÖã»ÖÖ ¯Ö׸ü¯Ö£Ö ¯Ö¸üßõÖÞÖ ¤êüŸÖÖ Æîü (a) »ÖÖîÆü ÆüÖ×®ÖµÖÖÑ (b) ŸÖÖ´ÖÏ ÆüÖ×®ÖµÖÖÑ (c) ‘ÖÂÖÔÞÖ ÆüÖ×®ÖµÖÖÑ (d) Ûãú»Ö ÆüÖ×®ÖµÖÖÑ ‹Ûú פü.¬ÖÖ. ´ÖÖê™ü¸ü ´Öë ×¾ÖÛú×ÃÖŸÖ µÖÖÓסÖÛú ¿Ö׌ŸÖ Æîü ²Ö¸üÖ²Ö¸ü (a) ×®Ö¾Öê¿Öß ¿Ö׌ŸÖ – ÛÎúÖê›ü ÆüÖ×®ÖµÖÖÑ (b) ×®Ö¾Öê¿Öß ¿Ö׌ŸÖ – µÖÖÓסÖÛú ÆüÖ×®ÖµÖÖÑ (c) †Ö´Öì“Ö¸ü ¬ÖÖ¸üÖ × ¯ÖÏןֳÖÖÝÖ ×¾Ö.¾ÖÖ.²Ö. (d) †Ö´Öì“Ö¸ü ¬ÖÖ¸üÖ × ¯ÖϤüÖµÖ ¾ÖÖê»™êü•Ö ‹Ûú ¾ÖîªãŸÖ ™Òêü®Ö ‹Ûú פü.¬ÖÖ. ÁÖêÞÖß ´ÖÖê™ü¸ü ÛúÖ ¯ÖϵÖÖêÝÖ Ûú¸üŸÖê Æãü‹ ‹Ûú ×®Ö׿“ÖŸÖ “ÖÖ»Ö ¯Ö¸ü “Ö»Ö ¸üÆüß Æîü … •Ö²Ö ¯ÖϤüÖµÖ Ûêú ¾ÖÖê»™êü•Ö ´Öë †“ÖÖ®ÖÛú ¯ÖÖŸÖ ÆüÖêŸÖÖ Æîü, ŸÖÖê µÖÆü ‘Ö×™üŸÖ ÆüÖêŸÖÖ Æîü (a) “ÖÖ»Ö ´Öë ¯ÖÖŸÖ †Öî¸ü ¬ÖÖ¸üÖ ´Öë ¾Öéרü (b) “ÖÖ»Ö ´Öë ¾Öéרü †Öî¸ü ¬ÖÖ¸üÖ ´Öë ¯ÖÖŸÖ (›ÒüÖò¯Ö) (c) “ÖÖ»Ö ´Öë ¾Öéרü †Öî¸ü ¬ÖÖ¸üÖ ´Öë ¾Öéר (d) “ÖÖ»Ö ´Öë ¯ÖÖŸÖ ¬ÖÖ¸üÖü †¯Ö׸ü¾ÖÙŸÖŸÖ ÃÖ×ÆüŸÖ ‹Ûú 220 V פü.¬ÖÖ. ¿ÖÓ™ü ´ÖÖê™ü¸ü 500 “Ö.¯ÖÏ.×´Ö. ¯Ö¸ü “Ö»Ö ¸üÆüÖ Æîü •Ö²Ö×Ûú †Ö´Öì“Ö¸ü ¬ÖÖ¸üÖ 50 A Æîü … †Ö´Öì“Ö¸ü ¯ÖÏןָüÖê¬Ö ÛúÖ ´ÖÖ®Ö 0.2 †Öê´Ö Æîü … ¤ãüÝÖã®Öê ²Ö»Ö-†Ö‘ÖæÞÖÔ ¯Ö¸ü ´ÖÖê™ü¸ü Ûúß “ÖÖ»Ö ÆüÖêÝÖß (a)

250 rpm

(b)

500 rpm

(c)

1000 rpm

(d)

476 rpm

55.

‹Ûú 10 kVA 220 V/220 V, 50 Hz ™ÒüÖÓñúÖò´ÖÔ¸ü »Ö‘Öã ¯Ö׸ü¯Ö£Ö ¯Ö¸üßõÖÞÖ ´Öë 340 W †Öî¸ü ÜÖã»ÖÖ ¯Ö׸ü¯Ö£Ö 168 W ¤ü¿ÖÖÔŸÖÖ Æîü … ‡ÃÖÛúß ¤üõÖŸÖÖ ¯ÖæÞÖÔ ³ÖÖ¸ü †Öî¸ü 0.8 ¯Ö¿“ÖÝÖÖ´Öß ¿Ö׌ŸÖ ÝÖãÞÖÖÓÛú ¯Ö¸ü »ÖÝÖ³ÖÝÖ Æîü (a) 92% (b) 94% (c) 96% (d) 98%

56.

µÖפü »Öî¯Ö ¾ÖêךüŸÖ פü.¬ÖÖ. •Ö×®Ö¡Ö ´Öë ¬ÖÐã¾ÖÖë Ûúß ÃÖÓܵÖÖ ¤ãüÝÖã®Öß Ûúß •ÖÖŸÖß Æîü, ŸÖÖê ˆŸ¯Ö®®Ö ×¾Ö.¾ÖÖ.²Ö. (a) ¤üÖêÝÖã®ÖÖ ²ÖœÌü •ÖÖµÖêÝÖÖ … (b) ¤üÖê Ûêú ÝÖãÞÖÛú ÃÖê ‘Ö™ü •ÖÖµÖêÝÖÖ … (c) “ÖÖ¸ü Ûêú ÝÖãÞÖÛú ÃÖê ²ÖœÌü •ÖÖµÖêÝÖÖ … (d) †¯Ö׸ü¾ÖÙŸÖŸÖ … ‹Ûú פü.¬ÖÖ. ÁÖêÞÖß ´ÖÖê™ü¸ü Ûúß “Öã´²ÖÛúßµÖ †×³Ö»ÖõÖÞÖ ¸êüÜÖßµÖ †Öî¸ü †Ö´Öì“Ö¸ü ¯ÖÏןָÖêü¬Ö ®ÖÝÖÞµÖ Æîü … ´ÖÖê™ü¸ü Ûúß “ÖÖ»Ö Æîü (a) T Ûêú ÃÖ´ÖÖ®Öã¯ÖÖŸÖß (b) T Ûêú ¾µÖãŸÛÎú´Ö †®Öã¯ÖÖŸÖß (c) T Ûêú ÃÖ´ÖÖ®Öã¯ÖÖŸÖß (d) T Ûêú ¾µÖãŸÛÎú´Ö †®Öã¯ÖÖŸÖß •ÖÆüÖÑ T = ²Ö»Ö-†Ö‘ÖæÞÖÔ

57.

KAU-07

11

¯Ö¸üßõÖÞÖ ´Öë

Series-A

58.

The most common type of prime mover used for low speed alternators is (a) Steam turbine (b) Petrol engine (c) Hydraulic turbine (d) Diesel engine

59.

When speed of an alternator is changed from 3600 rpm to 1800 rpm, the generated emf will be (a) one-half (b) twice (c) one-fourth (d) four times

60.

The power factor of an alternator is determined by its (a) prime mover (b) speed (c) excitation

(d)

load

61.

The efficiency of an ordinary transformer is maximum when (a) it runs at half of full speed (b) it runs at full load (c) copper losses are equal to iron losses (d) it runs at slightly overload

62.

At light load, efficiency of a transformer is low. It is because (a) copper loss is small. (b) copper loss is high. (c) secondary output is low. (d) fixed loss is high with respect to output.

63.

The essential condition for parallel operation of two single phase transformers is that they should have the same (a) Polarity (b) kVA rating (c) Voltage ratio (d) Percentage impedance

64.

A transformer transforms (a) frequency only (c) current only

(b) (d)

voltage only voltage and current

65.

Which of the following connections of a three phase transformer are best suited for 3-phase, 4-wire service ? (a) ∆ – ∆ (b) ϒ – ϒ (c) ∆ – ϒ (d) ϒ – ∆

66.

Transformers are rated in kVA instead of kW, because (a) load power factor is often not known. (b) total transformer loss depends on volt-ampere. (c) kVA is fixed where as kW depends on load power factor. (d) None of the above

67.

A transformer has negative voltage regulation when its load power factor is (a) Zero (b) Leading (c) Unity (d) Lagging

68.

A 4-pole dc generator runs at 1500 rpm. The frequency of current in armature winding is (a) zero (b) 25 Hz (c) 50 Hz (d) 100 Hz

69.

The no load current in a transformer lags the supply voltage by (a) 0° (b) 90° (c) 110°

(d)

about 75°

70.

Two mechanically coupled alternators deliver power at 50 Hz and 60 Hz respectively. The highest speed of alternators is (a) 600 rpm (b) 500 rpm (c) 3000 rpm (d) 3600 rpm

71.

The heat run test of a transformer without its loading is performed by means of (a) Short circuit test (b) Open circuit test (c) Half time short circuit test and half time open circuit test (d) Sumpner’s test

Series-A

12

KAU-07

58. 59. 60. 61.

62.

63. 64.

65.

»Ö‘Öã “ÖÖ»Ö ¯ÖÏŸµÖÖ¾ÖŸÖÔÛúÖë ´Öë ÃÖ¾ÖÖÔ׬ÖÛú ¯ÖÏ“Ö×»ÖŸÖ ¯ÖÏÛúÖ¸ü ÛúÖ ¯ÖϵÖãŒŸÖ ¯ÖÏÖ‡´Ö ´Öæ¾Ö¸ü Æîü (b) ¯Öê™ÒüÖê»Ö ‡Ó•Ö®Ö (c) ÆüÖ‡›ÒüÖê×»ÖÛú ™¸ü²ÖÖ‡®Ö (d) ›üß•Ö»Ö ‡Ó•Ö®Ö (a) ¾ÖÖÂ¯Ö ™¸ü²ÖÖ‡®Ö •Ö²Ö ‹Ûú ¯ÖÏŸµÖÖ¾ÖŸÖÔÛú Ûúß “ÖÖ»Ö ÛúÖê 3600 rpm ÃÖê 1800 rpm ŸÖÛú ²Ö¤ü»Ö פüµÖÖ •ÖÖŸÖÖ Æîü ŸÖÖê ˆŸ¯Ö®®Ö ×¾Ö.¾ÖÖ.²Ö. ÆüÖêÝÖÖ (a) †Ö¬ÖÖ (b) ¤ãüÝÖã®ÖÖ (c) ‹Ûú-“ÖÖî£ÖÖ‡Ô (d) “ÖÖ¸ü ÝÖã®ÖÖ ‹Ûú ¯ÖÏŸµÖÖ¾ÖŸÖÔÛú ÛúÖ ¿Ö׌ŸÖ ÝÖãÞÖÖÓÛú –ÖÖŸÖ ×ÛúµÖÖ •ÖÖŸÖÖ Æîü ‡ÃÖÛêú (a) ¯ÖÏÖ‡´Ö-´Öæ¾Ö¸ü ÃÖê (b) “ÖÖ»Ö ÃÖê (c) ˆ¢Öê•Ö®Ö ÃÖê (d) ³ÖÖ¸ü ÃÖê ‹Ûú ÃÖÖ´ÖÖ®µÖ ™ÒüÖÓñúÖò´ÖÔ¸ü Ûúß ¤üõÖŸÖÖ ˆ““ÖŸÖ´Ö Æîü •Ö²Ö (b) µÖÆü ¯ÖæÞÖÔ ³ÖÖ¸ü ¯Ö¸ü “Ö»ÖŸÖÖ Æîü … (a) µÖÆü ¯ÖæÞÖÔ “ÖÖ»Ö Ûêú †Ö¬Öê ¯Ö¸ü “Ö»ÖŸÖÖ Æîü … (c) ŸÖÖ´ÖÏ ÆüÖ×®ÖµÖÖÑ »ÖÖîÆü ÆüÖ×®ÖµÖÖë Ûêú ²Ö¸üÖ²Ö¸ü Æïü … (d) µÖÆü £ÖÖê›Ìêü ÃÖê †×ŸÖ³ÖÖ¸ü ¯Ö¸ü “Ö»ÖŸÖÖ Æîü … Æü»ÖÛêú ³ÖÖ¸ü ¯Ö¸ü ‹Ûú ™ÒüÖÓñúÖò´ÖÔ¸ü Ûúß ¤üõÖŸÖÖ Ûú´Ö ÆüÖêŸÖß Æîü … ‡ÃÖÛúÖ ÛúÖ¸üÞÖ Æîü : (b) ŸÖÖ´ÖÏ ÆüÖ×®Ö †×¬ÖÛú Æîü … (a) ŸÖÖ´ÖÏ ÆüÖ×®Ö Ûú´Ö Æîü … (c) ׫üŸÖßµÖÛú ×®ÖÝÖÔŸÖ Ûú´Ö Æîü … (d) ×®ÖÝÖÔŸÖ Ûúß †¯ÖêõÖÖ ×ãָü ÆüÖ×®Ö †×¬ÖÛú Æîü … ¤üÖê ‹Ûú»Ö Ûú»ÖÖ ™ÒüÖÓÃÖ±úÖò´ÖÔ¸üÖë Ûêú ÃÖ´ÖÖÓŸÖ¸ü ¯ÖÏ“ÖÖ»Ö®Ö Ûêú ×»Ö‹ †Ö¾Ö¿µÖÛú ¯ÖÏןֲÖÓ¬Ö Æîü ×Ûú ˆ®Ö´Öë ‹ÛúÃÖ´ÖÖ®Ö ÆüÖê®ÖÖ “ÖÖ×Æü‹ (b) kVA ÃÖÓ×®Ö¬ÖÖÔ¸üÞÖ (c) ¾ÖÖê»™êü•Ö †®Öã¯ÖÖŸÖ (d) ¯ÖÏ×ŸÖ¿ÖŸÖ ¯ÖÏןֲÖÖ¬ÖÖ (a) ¬ÖÐã¾ÖŸÖÖ ‹Ûú ™ÒüÖÓñúÖò´ÖÔ¸ü ºþ¯ÖÖ®ŸÖ׸üŸÖ Ûú¸üŸÖÖ Æîü (a) Ûêú¾Ö»Ö †Ö¾Öé×¢Ö (b) Ûêú¾Ö»Ö ¾ÖÖê»™êü•Ö (d) ¾ÖÖê»™êü•Ö †Öî¸ü ¬ÖÖ¸üÖ (c) Ûêú¾Ö»Ö ¬ÖÖ¸üÖ ×¡ÖÛú»ÖÖ ™ÒüÖÓñúÖò´ÖÔ¸ü Ûêú ×®Ö´®Ö ÃÖÓµÖÖê•Ö®ÖÖë ´Öë ÃÖê ÛúÖî®Ö ÃÖÖ ×¡ÖÛú»ÖÖ 4-ŸÖÖ¸ü ÃÖê¾ÖÖ Ûêú ×»Ö‹ ÃÖ²ÖÃÖê †×¬ÖÛú ˆ¯ÖµÖãŒŸÖ Æîü ? (a)

66.

67. 68. 69. 70.

(b)

ϒ–ϒ

(c)

∆–ϒ

(d)

ϒ–∆

™ÒüÖÓñúÖò´ÖÔ¸ü kW Ûúß †¯ÖêõÖÖ kVA ´Öë ÃÖÓ×®Ö¬ÖÖÔ׸üŸÖ ×ÛúµÖê •ÖÖŸÖê Æïü ŒµÖÖë×Ûú (a) ³ÖÖ¸ü ¿Ö׌ŸÖ ÝÖãÞÖÖÓÛú Ûúß ¯ÖÏÖµÖ: •ÖÖ®ÖÛúÖ¸üß ®ÖÆüà ÆüÖêŸÖß Æîü … (b) Ûãú»Ö ™ÒüÖÓÃÖ±úÖ´ÖÔ¸ü ÆüÖ×®Ö ¾ÖÖê»™ü-‹×´¯ÖµÖ¸ü ¯Ö¸ü ×®Ö³ÖÔ¸ü Ûú¸üŸÖß Æîü … (c) kVA ×®Ö׿“ÖŸÖ Æîü •Ö²Ö×Ûú kW ³ÖÖ¸ü ¿Ö׌ŸÖ ÝÖãÞÖÖÓÛú ¯Ö¸ü ×®Ö³ÖÔ¸ü Ûú¸üŸÖÖ Æîü … (d) ˆ¯Ö¸üÖêŒŸÖ ´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà ‹Ûú ™ÒüÖÓñúÖò´ÖÔ¸ü ÛúÖ ¾ÖÖê»™êü•Ö ×®ÖµÖ´Ö®Ö ŠúÞÖÖŸ´ÖÛú Æîü •Ö²Ö ‡ÃÖÛúÖ ³ÖÖ¸ü ¿Ö׌ŸÖ ÝÖãÞÖÖÓÛú Æîü : (a) ¿Öæ®µÖ (b) †ÝÖÏÝÖÖ´Öß (c) ‡ÛúÖ‡Ô (d) ¯Ö¿“ÖÝÖÖ´Öß ‹Ûú 4-¬ÖÐã¾Ö פü.¬ÖÖ.•Ö×®Ö¡Ö 1500 rpm ¯Ö¸ü “Ö»ÖŸÖÖ Æîü … †Ö´Öì“Ö¸ü ¾Öêšü®Ö ´Öë ¬ÖÖ¸üÖ Ûúß †Ö¾Öé×¢Ö Æîü (a) ¿Öæ®µÖ (b) 25 Hz (c) 50 Hz (d) 100 Hz ‹Ûú ™ÒüÖñúÖò´ÖÔ¸ü ´Öë ¿Öæ®µÖ ³ÖÖ¸ü ¬ÖÖ¸üÖ ¯ÖϤüÖµÖ ¾ÖÖê»™êü•Ö ÃÖê ¯Ö¿“ÖÝÖÖ´Öß ÆüÖêŸÖß Æîü (a) 0° (b) 90° (c) 110° (d) 75° Ûêú »ÖÝÖ³ÖÝÖ ¤üÖê µÖÖÓסÖÛúßµÖ µÖã×Ý´ÖŸÖ ¯ÖÏŸµÖÖ¾ÖŸÖÔÛú ÛÎú´Ö¿Ö: 50 Hz †Öî¸ü 60 Hz ¯Ö¸ü ¿Ö׌ŸÖ ¯ÖϤüÖ®Ö Ûú¸üŸÖê Æïü … ¯ÖÏŸµÖÖ¾ÖŸÖÔÛúÖë Ûúß ˆ““ÖŸÖ´Ö “ÖÖ»Ö Æîü (a)

71.

∆–∆

600 rpm

(b)

500 rpm

(c)

3000 rpm

(d)

3600 rpm

×ÛúÃÖß ™ÒüÖÓñúÖò´ÖÔ¸ü ÛúÖ ŸÖÖ¯Ö ¯ÖÏ“ÖÖ»Ö ¯Ö¸üßõÖÞÖ ×²Ö®ÖÖ ‡ÃÖÛúÖê ³ÖÖ׸üŸÖ Ûú¸üŸÖê Æãü‹ ÃÖ´¯Ö®®Ö ×ÛúµÖÖ •ÖÖŸÖÖ Æîü (a) »Ö‘Öã ¯Ö׸ü¯Ö£Ö ¯Ö¸üßõÖÞÖ Ûêú «üÖ¸üÖ (b) ÜÖã»ÖÖ ¯Ö׸ü¯Ö£Ö ¯Ö¸üßõÖÞÖ Ûêú «üÖ¸üÖ (c) †Ö¬Öê ÃÖ´ÖµÖ »Ö‘Öã ¯Ö׸ü¯Ö£Ö ¯Ö¸üßõÖÞÖ †Öî¸ü †Ö¬Öê ÃÖ´ÖµÖ ÜÖã»ÖÖ ¯Ö׸ü¯Ö£Ö ¯Ö¸üßõÖÞÖ Ûêú «üÖ¸üÖ (d) ÃÖ´¯Ö®Ö¸ü ¯Ö¸üßõÖÞÖ Ûêú «üÖ¸üÖ

KAU-07

13

Series-A

72.

For a d.c. series motor, which of the following expression is correct assuming torque (T) versus armature current (Ia) characteristics unsaturated ? (a) T∝ φ Ia (b) T∝ φIa (c) T∝ φ Ia (d) T∝ φ2 I2a where φ = air gap flux

73.

A d.c. series motor should never be started at (a) normal load condition. (b) (c) no load condition. (d)

full load condition. slightly overload condition.

74.

In a d.c. generator, 8 parallel paths and 16 brushes for collection of current are used. If voltage drop per brush is 1 V, then reduction in the induced e.m.f. will be (a) 2 V (b) 4 V (c) 8 V (d) 16 V

75.

The input impedance of a common base transistor is (a) Medium (b) Low (c) High

76.

77.

Transistor can be operated in (a) active region only (c) saturation region only

(d)

(b) (d)

cut-off region only All of the above

(c)

β=

Infinity

In a BJT (a)

β=

α 1+α

α=

(b)

β β–1

α 1–α

(d)

α=

β+1 β

IC IC where β = current gain = I , α = current ratio = I B

E

78.

For any inverting amplifier, the input capacitance due to Miller effect (a) increases (b) decreases (c) remains constant (d) None of these

79.

In an amplifier, if voltage shunt negative feedback is employed, then (a) the bandwidth decreases (b) the output resistance decreases (c) the input resistance decreases (d) the gain increases

80.

Feedback in an amplifier is used to (a) control output (c) decrease input resistance

(b) (d)

increase gain stabilize gain

81.

Out of the following hybrid parameters of a transistor which has unit of resistance ? (a) hf (b) hi (c) hr (d) ho

82.

A transistor has following currents : IB = 25 mA IC = 4.975 A Then IE is equal to (a) 5.225 A (b) 4.95 A

(c)

5.0 A

(d)

None of these

83.

When used as a voltage regulator, a zener diode is normally (a) forward biased (b) reversed biased (c) not biased (d) None of the above

84.

The expression for voltage gain Av of a positive feedback amplifier is 1 A A (a) (b) (c) (d) None of these 1–β 1 – βΑ 1+Α

Series-A

14

KAU-07

72.

‹Ûú פü.¬ÖÖ. ÁÖêÞÖß ´ÖÖê™ü¸ü Ûêú ×»Ö‹, ²Ö»Ö-†Ö‘ÖæÞÖÔ (T) †Öî¸ü †Ö´Öì“Ö¸ü ¬ÖÖ¸üÖ (Ia) †×³Ö»ÖõÖÞÖ ÛúÖê †ÃÖÓŸÖé¯ŸÖ ´ÖÖ®ÖŸÖê Æãü‹ ×®Ö´®Ö ¾µÖÓ•ÖÛúÖë ´Öë ÃÖê ÛúÖî®Ö ÃÖÖ ÃÖŸµÖ Æîü ? (a)

73.

74.

76.

77.

(b)

T∝ φIa

2V

(b)

4V

×ÛúÃÖß ˆ³ÖµÖ×®Öšü ²ÖêÃÖ ™ÒüÖÓוÖÙü¸ü Ûúß ×®Ö¾Öê¿Öß ¯ÖÏןֲÖÖ¬ÖÖ Æîü (a) ´Ö¬µÖ´Ö (b) ×®Ö´®Ö ™ÒüÖÓוÖÙü¸ü ¯ÖÏ“ÖÖ×»ÖŸÖ ×ÛúµÖÖ •ÖÖ ÃÖÛúŸÖÖ Æîü (a) Ûêú¾Ö»Ö ÃÖ×ÛÎúµÖ õÖê¡Ö ´Öë (c) Ûêú¾Ö»Ö ÃÖÓŸÖé¯ŸÖ õÖê¡Ö ´Öë ‹Ûú BJT ´Öë (a)

β=

α 1+α

(b) IC

•ÖÆüÖÑ ¯Ö¸ü β = ¬ÖÖ¸üÖ »Öײ¬Ö = I

α=

β β–1

, α = ¬ÖÖ¸üÖ

B

78. 79.

80.

81.

hf

84.

(d)

T∝ φ2 I2a

(c)

8V

(d)

16 V

(c)

ˆ““Ö

(d)

†®ÖÓŸÖ

(b) (d)

Ûêú¾Ö»Ö Ûú™ü-†Öò±ú õÖê¡Ö ´Öë ˆ¯Ö¸üÖêŒŸÖ ÃÖ³Öß ´Öë

(c)

β=

α 1–α

(d)

α=

β+1 β

IC

†®Öã¯ÖÖŸÖ = I

E

(b)

hi

(c)

hr

(d)

ho

(c)

5.0 A

(d)

‡®Ö´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà

×ÛúÃÖß ™ÒüÖÓוÖÙü¸ü ´Öë ×®Ö´®Ö×»Ö×ÜÖŸÖ ¬ÖÖ¸üÖ‹Ñ Æïü : IB = 25 mA IC = 4.975 A ŸÖÖê IE ²Ö¸üÖ²Ö¸ü Æîü (a) 5.225 A

83.

φ Ia

T∝

×ÛúÃÖß ¯ÖÏןֻÖÖê´Öß ¯ÖϾ֬ÖÔÛú Ûêú ×»Ö‹ ×´Ö»Ö¸ü ¯ÖϳÖÖ¾Ö Ûêú ÛúÖ¸üÞÖ ×®Ö¾Öê¿Öß ¬ÖÖ׸üŸÖÖ (a) ²ÖœÌüŸÖß Æîü … (b) ‘Ö™üŸÖß Æîü … (c) ×ãָü ¸üÆüŸÖß Æîü … (d) ‡®Ö´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà ×ÛúÃÖß ¯ÖϾ֬ÖÔÛú ´Öë µÖפü ¾ÖÖê»™êü•Ö ¿ÖÓ™ü ŠúÞÖÖŸ´ÖÛú ¯Öã®ÖÙ®Ö¾Öê¿Ö ¯ÖϵÖÖêÝÖ ×ÛúµÖÖ •ÖÖŸÖÖ Æîü, ŸÖÖê (a) ²Öï›ü “ÖÖî›ÌüÖ‡Ô ‘Ö™üŸÖß Æîü … (b) ×®ÖÝÖÔŸÖ ¯ÖÏןָüÖê¬Ö ‘Ö™üŸÖÖ Æîü … (c) ×®Ö¾Öê¿Öß ¯ÖÏןָüÖê¬Ö ‘Ö™üŸÖÖ Æîü … (d) »Öײ¬Ö ²ÖœÌüŸÖß Æîü … ×ÛúÃÖß ¯ÖϾ֬ÖÔÛú ´Öë ¯Öã®ÖÙ®Ö¾Öê¿Ö ¯ÖϵÖÖêÝÖ ×ÛúµÖÖ •ÖÖŸÖÖ Æîü (a) ×®ÖÝÖÔŸÖ ×®ÖµÖÓ×¡ÖŸÖ Ûú¸ü®Öê Ûêú ×»Ö‹ (b) »Öײ¬Ö ²ÖœÌüÖ®Öê Ûêú ×»Ö‹ (c) ×®Ö¾Öê¿Öß ¯ÖÏןָüÖê¬Ö ‘Ö™üÖ®Öê Ûêú ×»Ö‹ (d) »Öײ¬Ö ×ãָü Ûú¸ü®Öê Ûêú ×»Ö‹ ™ÒüÖÓוÖÙü¸ü Ûêú ×®Ö´®Ö ÃÖÓÛú¸ü ¯ÖÏÖ“Ö»ÖÖë ´Öë ÃÖê ×ÛúÃÖÛúß ‡ÛúÖ‡Ô ¯ÖÏןָüÖê¬Ö Æîü ? (a)

82.

(c)

•ÖÆüÖÑ ¯Ö¸ü φ = ¾ÖÖµÖã †®ŸÖ¸üÖ»Ö °»ÖŒÃÖ ‹Ûú פü.¬ÖÖ. ÁÖêÞÖß ´ÖÖê™ü¸ü ÛúÖê Ûú³Öß ³Öß ¯ÖÏÖ¸ü´³Ö ®ÖÆüà Ûú¸ü®ÖÖ “ÖÖ×Æü‹ ü(b) ¯ÖæÞÖÔ ³ÖÖ¸ü ¤ü¿ÖÖ ¯Ö¸ü (a) ÃÖÖ´ÖÖ®µÖ ³ÖÖ¸ü ¤ü¿ÖÖ ¯Ö¸ (c) ¿Öæ®µÖ ³ÖÖ¸ü ¤ü¿ÖÖ ¯Ö¸ü (d) Æü»ÖÛêú †×ŸÖ³ÖÖ¸ü ¤ü¿ÖÖ ¯Ö¸ü ‹Ûú פü.¬ÖÖ. •Ö×®Ö¡Ö ´Öë 8 ÃÖ´ÖÖÓŸÖ¸ü ¯Ö׸ü¯Ö£Ö †Öî¸ü ¬ÖÖ¸üÖ ÃÖÓÝÖÏÆü Ûú¸ü®Öê ÆêüŸÖã 16 ²ÖÎã¿Ö ¯ÖϵÖÖêÝÖ ×ÛúµÖê ÝÖµÖê Æïü … µÖפü ¯ÖÏ×ŸÖ ²ÖÎã¿Ö ×¾Ö³Ö¾Ö ¯ÖÖŸÖ 1 V ÆüÖê, ŸÖÖê ¯ÖÏê׸üŸÖ ×¾Ö.¾ÖÖ.²Ö. ´Öë Ûú´Öß ÆüÖêÝÖß (a)

75.

T∝ φ Ia

(b)

4.95 A

•Ö²Ö ‹Ûú ¾ÖÖê»™êü•Ö ×®ÖµÖÖ´ÖÛú Ûúß ŸÖ¸üÆü ¯ÖϵÖÖêÝÖ ×ÛúµÖÖ •ÖÖŸÖÖ Æîü, ŸÖÖê •Öָ߮ü ›üÖµÖÖê›ü ÃÖÖ´ÖÖ®µÖŸÖµÖÖ (a) †ÝÖÏ †×³Ö®ÖŸÖ ÆüÖêŸÖÖ Æîü … (b) ¾µÖãŸÛÎú´Ö †×³Ö®ÖŸÖ ÆüÖêŸÖÖ Æîü … (c) †×³Ö®ÖŸÖ ®ÖÆüà ÆüÖêŸÖÖ Æîü … (d) ˆ¯Ö¸üÖêŒŸÖ ´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà ‹Ûú ¬Ö®ÖÖŸ´ÖÛú ¯Öã®ÖÙ®Ö¾Öê¿Öß ¯ÖϾ֬ÖÔÛú Ûúß ¾ÖÖê»™êü•Ö »Öײ¬Ö Av ÛúÖ ¾µÖÓ•ÖÛú Æîü (a)

KAU-07

1 1–β

(b)

A 1 – βΑ

(c) 15

A 1+Α

(d)

‡®Ö´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà Series-A

85.

86. 87.

88.

89.

90. 91.

92. 93.

94.

In a single stage amplifier D.C and A.C load lines (a) are always parallel (b) are perpendicular to each other (c) cross each other at Q-point (d) are inclined but do not cross each other Phase reversed of 180° as compared to input occurs in the output of (a) CE amplifier (b) CB amplifier (c) CC amplifier (d) All of these Improper biasing of a transistor circuit leads to (a) excessive heat production in collector.(b) (c) heavy loading of emitter. (d)

faulty location of load line. distortion in output signal.

When a P-N junction is reverse biased (a) it offers high resistance (c) its barrier potential decreases

its depletion layer becomes narrow it breaks down

(b) (d)

The current gain of a common emitter transistor is 50. The change in emitter current for a corresponding change of 5 mA in base current will be (a) 50 mA (b) 55 mA (c) 250 mA (d) 255 mA If the maximum current of a half-wave rectified wave is 10 A, its r.m.s value is given by (a) 3.10 A (b) 5.0 A (c) 6.37 A (d) 7.07 A A common emitter amplifier is characterized by (a) low voltage gain (b) very high output impedance (c) moderate power gain (d) signal phase reversal The maximum rectification efficiency of a half-wave rectifier is (a) 40.6% (b) 81.2% (c) 88.0% (d) 100% The ripple factor of a power supply is a measure of (a) its filter efficiency (b) its voltage regulation (c) its purity of output (d) diode rating The power dissipation in a transistor is the product of (a) Emitter current and emitter to base voltage. (b) Collector current and collector to base voltage. (c) Emitter current and collector to emitter voltage. (d) None of the above

95.

Consider the following circuit configurations : 1. Common emitter 2. Common base 3. Emitter follower The correct sequence in increasing input impedance of these configuration is (a) 2, 1, 3 (b) 1, 2, 3 (c) 1, 3, 2 (d) 3, 2, 1

96.

The forbidden gap of a Germanium semiconductor material is (a) 0.12 eV (b) 0.72 eV (c) 7.20 eV (d) None of these In the following circuit, forward resistance of diode is zero. For the voltages shown at input and output of the transformer, the d.c. voltage across 5 ohm resistor will be

97.

(a) Series-A

40 V π

(b)

1 V π

(c) 16

5 V π

(d)

None of these KAU-07

85.

86. 87.

88.

89.

×ÛúÃÖß ‹Ûú»Ö Ùêü•Ö ¯ÖϾ֬ÖÔÛú ´Öë DC †Öî¸ü AC »ÖÖ‡®Öê (a) ÃÖ¤îü¾Ö ÃÖ´ÖÖ®ŸÖ¸ü Æïü … (b) ‹Ûú-¤æüÃÖ¸êü ¯Ö¸ü »Ö´²Ö¾ÖŸÖË ÆîüÓ … (c) ‹Ûú-¤æüÃÖ¸êü ÛúÖê Q-ײ֮¤ãü ¯Ö¸ü ÛúÖ™üŸÖß ÆîüÓ … (d) ןָü”ûß Æïü »Öê×Ûú®Ö ‹Ûú-¤æüÃÖ¸êü ÛúÖê ®ÖÆüà ÛúÖ™üŸÖß Æïü … ×®Ö¾Öê¿Öß Ûúß ŸÖã»Ö®ÖÖ ´Öë ×®ÖÝÖÔŸÖ ´Öë Ûú»ÖÖ ¾µÖãŸÛÎú´Ö 180° ‘Ö×™üŸÖ ÆüÖêŸÖÖ Æîü (b) CB ¯ÖϾ֬ÖÔÛú ´Öë (c) CC ¯ÖϾ֬ÖÔÛú ´Öë (d) µÖê ÃÖ³Öß ´Öë (a) CE ¯ÖϾ֬ÖÔÛú ´Öë ™ÒüÖÓוÖÙü¸ü ¯Ö׸ü¯Ö£Ö ÛúÖ ÝÖ»ÖŸÖ †×³Ö®ÖŸÖ †ÝÖÏ ÆüÖêŸÖÖ Æîü (a) ÃÖÓÝÖÏÖÆüÛú ´Öë †ŸµÖ׬ÖÛú ‰ú´ÖÖ ˆŸ¯Ö®®Ö ÆüÖê®ÖÖ … (b) ³ÖÖ¸ü »ÖÖ‡®Ö Ûúß ¤üÖêÂÖ¯ÖæÞÖÔ ×ãÖ×ŸÖ (c) ˆŸÃÖ•ÖÔÛú ÛúÖ †×¬ÖÛú ³ÖÖ׸üŸÖ ÆüÖê®ÖÖ … (d) ×®ÖÝÖÔŸÖ ÃÖÓÛêúŸÖ ´Öë ×¾ÖÛéú×ŸÖ •Ö²Ö ‹Ûú P-N ÃÖÓ×¬Ö ¾µÖãŸÛÎú´Ö †×³Ö®ÖŸÖ ÆüÖêŸÖÖ Æîü (a) µÖÆü ˆ““Ö ¯ÖÏןָüÖê¬Ö ¤êüŸÖÖ Æîü … (b) ‡ÃÖÛúÖ ÈüÖÃÖ ÃŸÖ¸ü ÃÖÓÛúßÞÖÔ ÆüÖê •ÖÖŸÖÖ Æîü … (d) ‡ÃÖÛúÖ ³ÖÓ•Ö®Ö ÆüÖê •ÖÖŸÖÖ Æîü … (c) ‡ÃÖÛúÖ ¸üÖê׬ÖÛúÖ ×¾Ö³Ö¾Ö ‘Ö™ü •ÖÖŸÖÖ Æîü … ×ÛúÃÖß ˆ³ÖµÖ×®Öšü ˆŸÃÖ•ÖÔÛú ™ÒüÖÓוÖÙü¸ü Ûúß ¬ÖÖ¸üÖ »Öײ¬Ö 50 Æîü … ²ÖêÃÖ ¬ÖÖ¸üÖ ´Öë 5 mA ÃÖÓÝÖŸÖ ¯Ö׸ü¾ÖŸÖÔ®Ö Ûêú ×»Ö‹ ˆŸÃÖ•ÖÔÛú ¬ÖÖ¸üÖ ´Öë ¯Ö׸ü¾ÖŸÖÔ®Ö ÆüÖêÝÖÖ (a)

50 mA

(b)

55 mA

(c) 10 A Æîü, (c)

250 mA

(d)

255 mA

90.

µÖפü †¨Ôü ŸÖ¸ÓüÝÖ ×¤ü™üÛúÖ׸üŸÖ ŸÖ¸ÓüÝÖ Ûúß ˆ““ÖŸÖ´Ö ¬ÖÖ¸üÖ

91.

‹Ûú ˆ³ÖµÖ×®Öšü ˆŸÃÖ•ÖÔÛú ¯ÖϾ֬ÖÔÛú †×³Ö»Ö×õÖŸÖ ÆüÖêŸÖÖ Æîü (a) ×®Ö´®Ö ¾ÖÖê»™êü•Ö »Öײ¬Ö ÃÖê (b) †×ŸÖ ˆ““Ö ×®ÖÝÖÔŸÖ ¯ÖÏןָüÖê¬Ö ÃÖê (c) ´Ö¬µÖ´Ö ¿Ö׌ŸÖ »Öײ¬Ö ÃÖê (d) ÃÖÓÛêúŸÖ Ûú»ÖÖ ¾µÖãŸÛÎú´ÖÞÖ ÃÖê ‹Ûú †¨Ôü ŸÖ¸ÓüÝÖ ×¤ü™üÛúÖ¸üß Ûúß ×¤ü™üÛúÖ¸üÞÖ ¤üõÖŸÖÖ ˆ““ÖŸÖ´Ö Æîü

(a)

92.

(a) 93.

94.

95.

97.

40.6%

(b)

(b)

5.0 A

81.2%

(c)

×ÛúÃÖß ¿Ö׌ŸÖ ¯ÖϤüÖµÖ ÛúÖ ‰úÙ´ÖÛúÖ ÝÖãÞÖÛú Æîü ®ÖÖ¯Ö ÛúÖ (a) ‡ÃÖÛúß ×±ú»™ü¸ü ¤üõÖŸÖÖ (b) (c) ‡ÃÖÛêú ×®ÖÝÖÔŸÖ Ûúß ¿Öã¨üŸÖÖ (d) ×ÛúÃÖß ™ÒüÖÓוÖÙü¸ü ´Öë ¿Ö׌ŸÖ õÖµÖ ÝÖãÞÖÛú Æîü (a) ˆŸÃÖ•ÖÔÛú ¬ÖÖ¸üÖ †Öî¸ü ˆŸÃÖ•ÖÔÛú ÃÖê ²ÖêÃÖ ¾ÖÖê»™êü•Ö (b) (c) ˆŸÃÖ•ÖÔÛú ¬ÖÖ¸üÖ †Öî¸ü ÃÖÓÝÖÏÖÆüÛú ÃÖê ˆŸÃÖ•ÖÔÛú ¾ÖÖê»™êü•Ö (d) ×®Ö´®Ö ¯Ö׸ü¯Ö£Ö ÃÖÓºþ¯ÖÞÖÖë ¯Ö¸ü ×¾Ö“ÖÖ¸ü Ûúßו֋ : 1. ˆ³ÖµÖ×®Öšü ˆŸÃÖ•ÖÔÛú 2. ˆ³ÖµÖ×®Öšü ²ÖêÃÖ ˆŸÃÖ•ÖÔÛú †®ÖãÝÖÖ´Öß 3. ‡®Ö ÃÖÓºþ¯ÖÞÖÖë Ûúß ²ÖœÌüŸÖß Æãü‡Ô ×®Ö¾Öê¿Öß ¯ÖÏןֲÖÖ¬ÖÖ ÛúÖ ÃÖÆüß ÛÎú´Ö Æîü : (a)

96.

3.10 A

2, 1, 3

(b)

1, 2, 3

(c)

ŸÖÖê ‡ÃÖÛúÖ ¾Ö.´ÖÖ.´Öæ. ´ÖÖ®Ö ×¤üµÖÖ •ÖÖŸÖÖ Æîü 6.37 A

88.0%

(d)

(d)

7.07 A

100%

‡ÃÖÛúÖ ¾ÖÖê»™êü•Ö ×®ÖµÖ´Ö®Ö ›üÖµÖÖê›ü ÛúÖ ÃÖÓ×®Ö¬ÖÖÔ¸üÞÖ ÃÖÓÝÖÏÖÆüÛú ¬ÖÖ¸üÖ †Öî¸ü ÃÖÓÝÖÏÖÆüÛú ÃÖê ²ÖêÃÖ ¾ÖÖê»™êü•Ö ˆ¯Ö¸üÖêŒŸÖ ´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà

1, 3, 2

(d)

3, 2, 1

•Ö´Öìê×®ÖµÖ´Ö †¨Ôü“ÖÖ»ÖÛú ¯Ö¤üÖ£ÖÔ ÛúÖ ¾ÖÙ•ÖŸÖ †®ŸÖ¸üÖ»Ö Æîü

‡®Ö´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà ×®Ö´®Ö ¯Ö׸ü¯Ö£Ö ´Öë ›üÖµÖÖê›ü ÛúÖ †ÝÖÏ ¯ÖÏןָüÖê¬Ö ¿Öæ®µÖ Æîü … ™ÒüÖÓñúÖò´ÖÔ¸ü Ûêú ×®Ö¾Öê¿Öß †Öî¸ü ×®ÖÝÖÔŸÖ ¯Ö¸ü ¤ü¿ÖÖÔµÖê ÝÖµÖê ¾ÖÖê»™êü•ÖÖë Ûêú ×»Ö‹ 5 †Öê´Ö ¯ÖÏןָüÖê¬ÖÛú Ûêú ׿ָüÖë ¯Ö¸ü פü.¬ÖÖ. ¾ÖÖê»™êü•Ö ÆüÖêÝÖÖ (a)

0.12 eV

(b)

0.72 eV

(c)

7.20 eV

(d)

(a)

40 V π

(b)

1 V π

(c)

5 V π

(d)

KAU-07

17

‡®Ö´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà Series-A

98. 99.

P-N junction diode is used for the following application : (a) Amplifier (b) Detector (c) Radio valve

(d)

None of these

In the following figure, V1 = 8.0 V and V2 = 0 V, Which diode will conduct (assume ideal diodes) ?

(a)

D1 only

(b)

D2 only

(c)

both (a) and (b) (d)

neither (a) nor (b)

100. Which one of the following is a non-maskable interrupt ? (a) RST 7.5 (b) RST 6.5 (c) RST 5.5 (d) TRAP 101. A balanced modulator is used for generation of which of the following ? (a) DSB-SC signal (b) FM signal (c) PM signal (d) PAM signal 8 102. A FM wave is given as v = 12 sin (6 × 10 t + 5 sin 1250 t). Its carrier frequency is (a) 60.0 MHz (b) 95.5 MHz (c) 125.0 MHz (d) 276.3 MHz 103. An operational amplifier has a differential gain of 100 and a common mode gain of 0.01. Its CMRR will be (a) 20 dB (b) 40 dB (c) 60 dB (d) 80 dB 104. An input of Vi = 5.0 cos ωt is given to an Op-Amp integrator circuit. If R = 2.0 M ohm and C = 1.0 µF, then output will be (a) 10 W sin ωt (b) 5 W sin ωt (c) –2.5 W sin ωt (d) –0.5 W sin ωt 105. The full scale output of an 8 bit DAC for 0 to 10 V range is (a) 1.961 V (b) 9.961 V (c) 96.11 V (d) 1.996 V 106. Memory range of a memory chip 1 K is (a) 0000H to 03FFH (b) 0001H to 01FFH (c) 0000H to 02FFH (d) 0000H to 04FFH 107. Which one of the following gate-symbol combinations is false ? (a) NOR gate (b) NAND gate (c)

108. 109.

110.

111.

(d) NOT gate ––––– Which one of the following is equal to A + B ? (a) A ⋅ (b) A ⋅ B (c) ⋅B (d) ⋅ The basic memory cell in a DRAM is a (a) MOSFET (b) Capacitor (c) Capacitor and a MOS switch (d) Flip-Flop Absorption of radio waves in atmosphere depends on (a) frequency of waves (b) distance from transmitter (c) polarisation of waves (d) polarisation of atmosphere Each flip-flop in a 4-bit ripple counter introduces a maximum delay of 40 n sec. The maximum clock frequency is (a) 2.65 MHz (b) 6.25 MHz (c) 5.26 MHz (d) 6.52 MHz

Series-A

AND gate

18

KAU-07

99.

P-N ÃÖÓ×¬Ö ›üÖµÖÖê›ü ×®Ö´®Ö †®Öã¯ÖϵÖÖêÝÖ Ûêú ×»Ö‹ ¯ÖϵÖÖêÝÖ ×ÛúµÖÖ •ÖÖŸÖÖ Æîü : (b) ÃÖÓÃÖæ“ÖÛú (c) ¸êü×›üµÖÖê ¾ÖÖ»¾Ö (d) (a) ¯ÖϾ֬ÖÔÛú ×®Ö´®Ö ×“Ö¡Ö ´Öë V1 = 8.0 V †Öî¸ü V2 = 0 V … ÛúÖî®Ö ÃÖÖ ›üÖµÖÖê›ü “Ö×»ÖŸÖ ÆüÖêÝÖÖ (›üÖµÖÖê›üÖë ÛúÖê

100.

Ûêú¾Ö»Ö D1 (a) †Öî¸ü (b) ¤üÖê®ÖÖë ×®Ö´®Ö×»Ö×ÜÖŸÖ ´Öë ÃÖê ÛúÖî®Ö ÃÖÖ ÝÖî¸ü-´ÖÖÃÛêú²Ö»Ö ‡®™Òü¯™ü Æîü ?

98.

(a) (c) (a)

101. 102.

RST 6.5

60.0 MHz

(b)

95.5 MHz

RST 5.5

(c)

20 dB

(b)

40 dB

(c)

10 W sin ωt

(b)

5 W sin ωt

(c)

105. 0 ÃÖê 10 V Ûêú ¯Ö¸üÖÃÖ Ûêú ×»Ö‹ ‹Ûú 8-ײ֙ü DAC ÛúÖ (a) 1.961 V (b) 9.961 V 106. 1 K ôÖé×ŸÖ ×“Ö¯Ö ÛúÖ Ã´Öé×ŸÖ ¯Ö¸üÖÃÖ Æîü (a) 0000H ÃÖê 03FFH (c) 0000H ÃÖê 02FFH

(d) Æîü ? (d)

TRAP

125.0 MHz

(d)

276.3 MHz

60 dB

(d)

80 dB

–2.5 W sin ωt (d)

– 0.5 W sin ωt

¯ÖæÞÖÔ ÃÛêú»Ö ×®ÖÝÖÔŸÖ Æîü (c)

96.11 V

(d)

(b) (d)

0001H ÃÖê 01FFH 0000H ÃÖê 04FFH

(b)

NAND gate

(d)

NOT gate

1.996 V

×®Ö´®Ö ÝÖê™ü-ÃÖÓÛêúŸÖ ÃÖÓµÖÖê•Ö®ÖÖë ´Öë ÃÖê ÛúÖî®Ö ÃÖÖ ÝÖ»ÖŸÖ Æîü ? (a)

NOR gate

(c)

AND gate ––––– 108. ×®Ö´®Ö ´Öë ÃÖê ÛúÖî®Ö ÃÖÖ A + B Ûêú ÃÖ´ÖÖ®Ö Æîü ? (a) A ⋅ (b) A ⋅ B 109. DRAM ´Öë †Ö¬ÖÖ¸ü³ÖæŸÖ ôÖé×ŸÖ ÃÖê»Ö Æîü (a) MOSFET (c) ÃÖÓ¬ÖÖ׸ü¡Ö †Öî¸ü ´ÖÖîÃÖ ×Ã¾Ö“Ö 110. ¾ÖÖŸÖÖ¾Ö¸üÞÖ ´Öë ¸êü×›üµÖÖê ŸÖ¸ÓüÝÖÖë ÛúÖ †¾Ö¿ÖÖêÂÖÞÖ (a) ŸÖ¸ÓüÝÖÖë Ûúß †Ö¾Öé×¢Ö ¯Ö¸ü (c) ŸÖ¸ÓüÝÖÖë Ûêú ¬ÖÐã¾ÖßÛú¸üÞÖ ¯Ö¸ü 111.

(c)

‹Ûú Vi = 5.0 cos ωt ×®Ö¾Öê¿Öß ‹Ûú †Öî¯Ö-‹´¯Ö ÃÖ´ÖÖÛú»ÖÛú ¯Ö׸ü¯Ö£Ö ÛúÖê פüµÖÖ •ÖÖŸÖÖ Æîü … µÖפü R = 2.0 M †Öê´Ö †Öî¸ü C = 1.0 µF ÆüÖê, ŸÖÖê ×®ÖÝÖÔŸÖ ÆüÖêÝÖÖ (a)

107.

Ûêú¾Ö»Ö D2 (a) †Öî¸ü (b) ´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà

‹Ûú ÃÖÓ×ÛÎúµÖÖŸ´ÖÛú ¯ÖϾ֬ÖÔÛú ´Öë ³Öê¤ü »Ö²¬ÖµÖÖÓÛú 100 †Öî¸ü ˆ³ÖµÖ×®Öšü ×¾Ö¬ÖÖ »Öײ¬Ö 0.01 Æîü … ‡ÃÖÛúÖ CMRR ÆüÖêÝÖÖ : (a)

104.

(b)

(b) (d)

‹Ûú ÃÖÓŸÖã×»ÖŸÖ ´ÖÖò›ãü»Öê™ü¸ü ×®Ö´®Ö ´Öë ÃÖê ×ÛúÃÖÛúÖê ˆŸ¯Ö®®Ö Ûú¸ü®Öê Ûêú ×»ÖµÖê ¯ÖϵÖÖêÝÖ ×ÛúµÖÖ •ÖÖŸÖÖ (a) DSB-SC ÃÖÓÛêúŸÖ (b) FM ÃÖÓÛêúŸÖ (c) PM ÃÖÓÛêúŸÖ PAM ÃÖÓÛêúŸÖ 8 ‹Ûú FM ŸÖ¸ÓüÝÖ v = 12 sin (6 × 10 t + 5 sin 1250 t) Ûúß ŸÖ¸üÆü ¤üß ÝÖµÖß Æîü … ‡ÃÖÛúß ¾ÖÖÆüÛú †Ö¾Öé×¢Ö Æîü : (a)

103.

RST 7.5

‡®Ö´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà †Ö¤ü¿ÖÔ ´ÖÖ×®ÖµÖê) ?

(b) (d)

KAU-07

2.65 MHz

(b)

⋅B

(d)



ÃÖÓ¬ÖÖ׸ü¡Ö ×°»Ö¯Ö-°»ÖÖò¯Ö

×®Ö³ÖÔ¸ü Ûú¸üŸÖÖ Æîü

‹Ûú 4-ײ֙ü ‰úÙ´ÖÛúÖ ÝÖ×ÞÖ¡Ö ´Öë ¯ÖÏŸµÖêÛú ×°»Ö¯Ö-°»ÖÖò¯Ö †Ö¾Öé×¢Ö Æîü (a)

(c)

¯ÖÏêÂÖß ÃÖê ¤æü¸üß ¯Ö¸ü ¾ÖÖŸÖÖ¾Ö¸üÞÖ Ûêú ¬ÖÐã¾ÖßÛú¸üÞÖ ¯Ö¸ü sec. ÛúÖ †×¬ÖÛúŸÖ´Ö ×¾Ö»Ö´²Ö ¤êüŸÖÖ Æîü … ˆ““ÖŸÖ´Ö Œ»ÖÖòÛú

(b) (d) 40 n

6.25 MHz

(c) 19

5.26 MHz

(d)

6.52 MHz Series-A

112. Which IC is a decade counter ? (a) 7476 (b) 7486

(c)

7404

(d)

7490

113. Consider following gates : 1. NAND 2. NOR 3. XOR Out of these gates, the universal gates are (a) 1 and 3 only (b) 2 and 3 only

(c)

1 and 2 only

(d)

1, 2 and 3

114. How many flip-flops are required to build a binary counter circuit to count from 0 to 1023 ? (a) 1 (b) 6 (c) 10 (d) 23 – – 115. The number of NAND gates required to implement a function A + AB + ABC is equal to (a) 0 (b) 1 (c) 4 (d) 5 116. With reference to following logic circuit, the output will be

(a)

– – A⋅B

(b)

––– AB

(c)

A+B

117. Which of the following are 3 byte instruction set ? (a) MV 1A, 32 H (b) JMP 2085 H (c) MOV C, A

(d)

– – A+B

(d)

ADD B

118. In the following Op-Amp circuit, the output Vo is

(a) (c)

2V1 + V2 – 2V3 V1 + V2 + V3

(b) (d)

2(V1 + V2) – V3 V1 + 2V2 – V3

119. Which of the following oscillators is used for generation of high frequency signal ? (a) RC phase shift oscillator (b) Blocking oscillator (c) Wein bridge oscillator (d) L-C oscillator 120. In a positive edge triggered JK flip-flop, J = 1, K = 0 and clock pulse is rising, Q will be (a) 0 (b) 1 (c) showing no change (d) toggle 121. Kaplan turbines are used whenever the water head is (a) low (b) high (c) medium (d) (b) and (c) 122. The cost of fuel transportation is minimum in (a) Steam power plant (b) Diesel power plant (c) Hydro-electric plant (d) Coal based power plant Series-A

20

KAU-07

112.

ÛúÖî®Ö ÃÖÖ IC ¤ü¿ÖÛú ÝÖ×ÞÖ¡Ö Æîü ? (a)

113.

114.

7476

(b)

7486

1. 2. 3.

NAND NOR XOR

(a)

1

×®Ö´®Ö

(a) (c)

120. 121. 122.

7490

– – A⋅B

(b)

(c)

10

(d)

23

Ûú¸ü®Öê Ûêú ×»Ö‹ NAND ÝÖê™üÖë Ûúß ÃÖÓܵÖÖ ²Ö¸üÖ²Ö¸ü Æîü

––– AB

(c)

4

(d)

5

(c)

A+B

(d)

– – A+B

(c)

MOV C, A

(d)

ADD B

(b) (d)

2(V1 + V2) – V3 V1 + 2V2 – V3

×®Ö´®Ö ´Öë ÃÖê ÛúÖî®Ö ÃÖÖ 3 ²ÖÖ‡™ü †®Öã¤êü¿Ö ÃÖê™ü Æîü ? (a)

119.

(d)

‡®Ö ÝÖê™üÖë ´Öë ÃÖê ÃÖÖ¾ÖÔסÖÛú ÝÖê™ü ÆîüÓ (a) Ûêú¾Ö»Ö 1 †Öî¸ü 3 (b) Ûêú¾Ö»Ö 2 †Öî¸ü 3 (c) Ûêú¾Ö»Ö 1 †Öî¸ü 2 (d) 1, 2 †Öî¸ü 3 ‹Ûú ׫ü-†Ö¬ÖÖ¸üß ÝÖ×ÞÖ¡Ö ¯Ö׸ü¯Ö£Ö ÛúÖê ²Ö®ÖÖ®Öê Ûêú ×»Ö‹ 0 ÃÖê 1023 ÝÖÞÖ®ÖÖ ÆêüŸÖã ×ÛúŸÖ®Öê ×°»Ö¯Ö-°»ÖÖò¯ÖÖë Ûúß †Ö¾Ö¿µÖÛúŸÖÖ Æîü ?

(a)

118.

7404

×®Ö´®Ö ÝÖê™üÖë ¯Ö¸ü ×¾Ö“ÖÖ¸ü Ûúßו֋ :

(b) 6 – – 115. ‹Ûú ±ú»Ö®Ö A + AB + ABC ÛúÖê ×®Öºþ×¯ÖŸÖ (a) 0 (b) 1 116. ×®Ö´®Ö ŸÖÛÔú ¯Ö׸ü¯Ö£Ö Ûêú ÃÖÓ¤ü³ÖÔ ´Öë ×®ÖÝÖÔŸÖ ÆüÖêÝÖÖ :

117.

(c)

MV 1A, 32 H (b) JMP 2085 H Op-Amp ¯Ö׸ü¯Ö£Ö ´Öë ×®ÖÝÖÔŸÖ Vo Æî :ü

2V1 + V2 – 2V3 V1 + V2 + V3

×®Ö´®Ö ¤üÖê»ÖÛúÖë ´Öë ÃÖê ÛúÖî®Ö ÃÖÖ ˆ““Ö †Ö¾Öé×¢Ö ÃÖÓÛêúŸÖ ˆŸ¯Ö®®Ö Ûú¸ü®Öê Ûêú ×»Ö‹ ¯ÖϵÖÖêÝÖ ×ÛúµÖÖ •ÖÖŸÖÖ Æîü ? (a) RC Ûú»ÖÖ ×¾ÖãÖÖ¯Ö®Ö ¤üÖê×»Ö¡Ö (b) ²»ÖÖòØÛúÝÖ ¤üÖê×»Ö¡Ö (c) ¾Öß®Ö ÃÖêŸÖã ¤üÖê×»Ö¡Ö (d) L-C ¤üÖê×»Ö¡Ö ‹Ûú ¬Ö®ÖÖŸ´ÖÛú ÛúÖê¸ü ×™ÒüÝÖ›Ôü JK ×°»Ö¯Ö-°»ÖÖò¯Ö ´Öë J = 1, K = 0 †Öî¸ü Œ»ÖÖòÛú ïÖÓ¤ü ²ÖœÌü ¸üÆüÖ Æîü, Q ÆüÖêÝÖÖ (a) 0 (b) 1 (c) ÛúÖê‡Ô ¯Ö׸ü¾ÖŸÖÔ®Ö ®ÖÆüà (d) ™üÖòÝÖ»Ö Ûîú¯»ÖÖ®Ö ™¸ü²ÖÖ‡®Ö ¯ÖϵÖÖêÝÖ Ûúß •ÖÖŸÖß Æîü •Ö²Ö Ûú³Öß •Ö»Ö ¿ÖßÂÖÔ ÆüÖêŸÖÖ Æîü (a) ×®Ö´®Ö (b) ˆ““Ö (c) ´Ö¬µÖ´Ö (d) (b) †Öî¸ü (c) ‡Õ¬Ö®Ö ¯Ö׸ü¾ÖÆü®Ö Ûúß Ûúß´ÖŸÖ ®µÖæ®ÖŸÖ´Ö Æîü (a) ¾ÖÖÂ¯Ö ¿Ö׌ŸÖ ¯»ÖÖÓ™ü ´Öë (b) ›üß•ÖÌ»Ö ¿Ö׌ŸÖ ¯»ÖÖÓ™ü ´Öë (c) •Ö»Ö-¾ÖîªãŸÖ ¯»ÖÖÓ™ü ´Öë (d) ÛúÖêµÖ»ÖÖ †Ö¬ÖÖ׸üŸÖ ¿Ö׌ŸÖ ¯»ÖÖÓ™ü ´Öë

KAU-07

21

Series-A

123. Economisers are used to heat (a) Coal (b) Air

(c)

Steam

(d)

Feed water

124. In thermal power plants, the pressure of working fluid cycle is developed by (a) Condenser (b) Superheater (c) Feed water pump (d) Turbine 125. A gas turbine power plant is best suited for (a) base load (b) (c) emergency purpose (d)

peak load None of the above

126. Out of the following plant categories : (i) Nuclear (iii) Pump storage The base load power plants are (a) (i) and (ii) (b) (ii) and (iii)

(i), (ii) and (iii) (d)

(ii) Run-off river (iv) Diesel (c)

(i), (iii) and (iv)

127. Which of the following components is not a part of hydro-electric plant ? (a) Penstock (b) Spillway (c) Surge tank (d) Economiser 128. Which one is not a commonly used coolant for fast breeder reactor ? (a) Water (b) Liquid metal (c) Helium (d) 129. Combined cycle power plants may need (a) MHD generator (c) Thermoelectric generator

(b) (d)

Carbon dioxide

Thermionic converter All of the above

130. The pH value of water used for boiler of thermal power plant is (a) unity (b) 7 (c) slightly more than 7 (d) 10 131. The expression for power plant output in kilo-watt of a hydro-electric plant is given by 0.736 Q.Wh ⋅ ηo 75 Q.Wh ⋅ ηo 0.736 Q.W.h (a) (b) (c) (d) None of these 75 0.736 75 × ηo 132. A cable has inductance of 0.22 mH per kilometer and capacitance of 0.202 µF per kilometer. The surge impedance of the cable is (a) 50 Ω (b) 42 Ω (c) 33 Ω (d) 28 Ω 133. The first nuclear power plant was built in India at which place ? (a) Tarapur (b) Rana Pratap Sagar (c) Kalpakkam (d) Narora 134. Sag of conductors between two electric poles can be determined by WL2 WL2 WL2 (a) (b) (c) (d) 8T 16T 2T Where W = weight per unit length of conductor in kg/m L = Distance between two poles in metre T = Tension in conductors in kg-m

WL2 T

135. The economic size of a conductor in transmission and distribution lines of electric power is decided by (a) Ohm’s law (b) Kelvin’s law (c) Kirchhoff’s law(d) Faraday’s law 136. Which alternator will have more number of poles ? (a) coupled to steam turbine (b) coupled to gas turbine (c) coupled to hydraulic turbine (d) None of the above Series-A

22

KAU-07

123. 124.

125.

126.

127. 128. 129.

130.

131.

‡ÛúÖê®ÖÖê´ÖÖ‡•Ö¸üÖë ÛúÖê ÝÖ´ÖÔ Ûú¸ü®Öê Ûêú ×»Ö‹ ¯ÖϵÖÖêÝÖ ×ÛúµÖÖ •ÖÖŸÖÖ Æîü (b) ¾ÖÖµÖã ÛúÖê (c) ¾ÖÖÂ¯Ö ÛúÖê (d) (a) ÛúÖêµÖ»ÖÖ ÛúÖê ŸÖÖ¯ÖßµÖ ¿Ö׌ŸÖ ¯»ÖÖÓ™üÖë ´Öë ×ÛÎúµÖÖ¿Öᯙ ¦ü¾Ö “ÖÛÎú ÛúÖ ¤ü²ÖÖ¾Ö ×¾ÖÛú×ÃÖŸÖ ×ÛúµÖÖ •ÖÖŸÖÖ Æîü (a) ÛÓú›ëüÃÖ¸ü Ûêú «üÖ¸üÖ (b) ÃÖã¯Ö¸üÆüß™ü¸ü Ûêú «üÖ¸üÖ (c) ×®Ö¾Öê¿µÖ •Ö»Ö ¯Ö´¯Ö Ûêú «üÖ¸üÖ (d) ™ü¸ü²ÖÖ‡®Ö Ûêú «üÖ¸üÖ ‹Ûú ÝÖîÃÖ ™ü¸ü²ÖÖ‡®Ö ¿Ö׌ŸÖ ¯»ÖÖ®™ü ÃÖ¾ÖÖÔ׬ÖÛú ˆ¯ÖµÖãŒŸÖ Æîü (a) †Ö¬ÖÖ¸ü ³ÖÖ¸ü Ûêú ×»Ö‹ (b) ׿ÖÜÖ¸ü ³ÖÖ¸ü Ûêú ×»Ö‹ (c) †Ö¯ÖÖŸÖÛúÖ»Öß®Ö ˆ§êü¿µÖ Ûêú ×»Ö‹ (d) ˆ¯Ö¸üÖêŒŸÖ ´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà ×®Ö´®Ö ÁÖêÞÖß Ûêú ¯»ÖÖÓ™üÖë ´Öë ÃÖê : (i) ®ÖÖ׳ÖÛúßµÖ (ii) ®Ö¤üß ²ÖÖÊ ²ÖÆüÖ¾Ö (iii) ¯Ö´¯Ö ³ÖÓ›üÖ¸üÞÖ (iv) †Ö¬ÖÖ¸ü ³ÖÖ¸ü ¯ÖÖ¾Ö¸ü ¯»ÖÖÓ™ü Æïü (a) (i) †Öî¸ü (ii) (b) (ii) †Öî¸ü (iii) (c) (i), (ii) †Öî¸ü (iii) (d) ×®Ö´®Ö ‘Ö™üÛúÖë ´Öë ÃÖê ÛúÖî®Ö ÃÖÖ •Ö»Ö-¾ÖîªãŸÖ ¯»ÖÖÓ™ü ÛúÖ ×ÆüÃÃÖÖ ®ÖÆüà Æîü ? (a) ¯Öê®ÖÙüÖòÛú (b) ×Ã¯Ö»Ö ¾Öê (c) ÃÖ•ÖÔ ™ïüÛú (d) ŸÖß¾ÖÎ ²ÖÎß›ü¸ü ׸ü‹Œ™ü¸ü Ûêú ×»Ö‹ ÛúÖî®Ö ÃÖÖ Ûæú»Öë™ü ÃÖÖ´ÖÖ®µÖŸÖµÖÖ ¯ÖϵÖÖêÝÖ ®ÖÆüà ×ÛúµÖÖ •ÖÖŸÖÖ Æîü ? (b) ¦ü¾Ö ¬ÖÖŸÖã (c) Æüß×»ÖµÖ´Ö (d) (a) •Ö»Ö ÃÖÓµÖãŒŸÖ “ÖÛÎú ¿Ö׌ŸÖ ¯»ÖÖÓ™üÖë ´Öë †Ö¾Ö¿µÖÛúŸÖÖ ÆüÖê ÃÖÛúŸÖß Æîü (a) MHD •Ö×®Ö¡Ö (b) ŸÖÖ¯ÖÖµÖ®Öß ¯Ö׸ü¾ÖÙŸÖ¡Ö (d) ˆ¯Ö¸üÖêŒŸÖ ÃÖ³Öß (c) ŸÖÖ¯Ö-¾ÖîªãŸÖ •Ö×®Ö¡Ö ŸÖÖ¯ÖßµÖ ¿Ö׌ŸÖ ¯»ÖÖÓ™ü Ûêú ²ÖÖòµÖ»Ö¸ü Ûêú ×»Ö‹ ¯ÖϵÖãŒŸÖ •Ö»Ö ÛúÖ pH ´ÖÖ®Ö Æîü (a) ‡ÛúÖ‡Ô (b) 7 (d) 10 (c) 7 ÃÖê £ÖÖê›ÌüÖ ÃÖÖ •µÖÖ¤üÖ ‹Ûú •Ö»Ö-¾ÖîªãŸÖ ¯»ÖÖÓ™ü Ûêú ×Ûú»ÖÖê ¾ÖÖ™ü ´Öë ¿Ö׌ŸÖ ¯»ÖÖÓ™ü ×®ÖÝÖÔŸÖ Ûêú ×»Ö‹ ¾µÖÓ•ÖÛú פüµÖÖ •ÖÖŸÖÖ Æîü (a)

132.

134.

•ÖÆüÖÑ

136.

0.736 Q.Wh ⋅ ηo (c) 75

50 Ω

(b)

0.22 mH

75 Q.Wh ⋅ ηo (d) 0.736

†Öî¸ü ¯ÖÏ×ŸÖ ×Ûú»ÖÖê´Öß™ü¸ü ¬ÖÖ׸üŸÖÖ

42 Ω

(c)

33 Ω

³ÖÖ¸üŸÖ ´Öë ¯ÖÏ£Ö´Ö ®ÖÖ׳ÖÛúßµÖ ¿Ö׌ŸÖ ¯»ÖÖÓ™ü ×ÛúÃÖ Ã£ÖÖ®Ö ¯Ö¸ü ²Ö®ÖÖ Æîü ? (a) ŸÖÖ¸üÖ¯Öã¸ü (b) ¸üÖÞÖÖ ¯ÖÏŸÖÖ¯Ö ÃÖÖÝÖ¸ü (c) Ûú»Ö¯ÖŒÛú´Ö ¤üÖê ×¾ÖªãŸÖ ¯ÖÖê»ÖÖë Ûêú ²Öß“Ö “ÖÖ»ÖÛúÖë Ûêú —ÖÖê»Ö ÛúÖê –ÖÖŸÖ ×ÛúµÖÖ •ÖÖ ÃÖÛúŸÖÖ Æîü (a)

135.

(b)

‹Ûú Ûêú×²Ö»Ö ÛúÖ ¯ÖÏ×ŸÖ ×Ûú»ÖÖê´Öß™ü¸ü ¯ÖÏê¸üÛúŸ¾Ö ˆŸÛúÂÖÔ ¯ÖÏןֲÖÖ¬ÖÖ Æîü (a)

133.

0.736 Q.W.h 75 × ηo

WL2 WL2 WL2 «ü Ö ¸ü Ö (b) «ü Ö ¸ü Ö (c) 8T 16T 2T «üÖ¸üÖ ¯Ö¸ü W = “ÖÖ»ÖÛú ÛúÖ ¯ÖÏ×ŸÖ ‡ÛúÖ‡Ô »Ö´²ÖÖ‡Ô ³ÖÖ¸ü kg/m ´Öë L = ¤üÖê ×¾ÖªãŸÖ ¯ÖÖê»ÖÖë Ûêú ²Öß“Ö Ûúß ¤æü¸üß ´Öß™ü¸ü ´Öë T = “ÖÖ»ÖÛúÖë ´Öë ŸÖ®ÖÖ¾Ö kg-m ´Öë

×®Ö¾Öê¿µÖ (feed) •Ö»Ö ÛúÖê

›üß•Ö»Ö (i), (iii) †Öî¸ü (iv)

‡ÛúÖê®ÖÖê´ÖÖ‡•Ö¸ü ÛúÖ²ÖÔ®Ö ›üÖ‡†ÖòŒÃÖÖ‡›ü

‡®Ö´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà

0.202 µF

Æîü … Ûêú×²Ö»Ö Ûúß

(d)

28 Ω

(d)

®Ö¸üÖê¸üÖ

(d)

WL2 T «üÖ¸üÖ

¾ÖîªãŸÖ ¿Ö׌ŸÖ Ûêú ¯ÖÖ¸êüÂÖÞÖ †Öî¸ü ×¾ÖŸÖ¸üÞÖ »ÖÖ‡®ÖÖë ´Öë “ÖÖ»ÖÛú Ûúß †ÖÙ£ÖÛú ÃÖÖ‡•Ö ×®Ö׿“ÖŸÖ Ûúß •ÖÖŸÖß Æîü (a) †Öê´Ö Ûêú ×®ÖµÖ´Ö «üÖ¸üÖ (b) Ûêú×»¾Ö®Ö Ûêú ×®ÖµÖ´Ö «üÖ¸üÖ (c) ×Ûú¸ü“ÖÖî±ú Ûêú ×®ÖµÖ´Ö «üÖ¸üÖ (d) ±îú¸üÖ›êü Ûêú ×®ÖµÖ´Ö «üÖ¸üÖ ÛúÖî®Ö ÃÖê ¯ÖÏŸµÖÖ¾ÖŸÖÔÛú ´Öë ¬ÖÐã¾ÖÖë Ûúß ÃÖÓܵÖÖ †×¬ÖÛú ÆüÖêÝÖß ? (a) ¾ÖÖÂ¯Ö ™ü¸ü²ÖÖ‡®Ö ÃÖê µÖã×Ý´ÖŸÖ (b) ÝÖîÃÖ ™ü¸ü²ÖÖ‡®Ö ÃÖê µÖã×Ý´ÖŸÖ (c) ¦ü¾Ö “ÖÖ×»ÖŸÖ ™¸ü²ÖÖ‡®Ö ÃÖê µÖã×Ý´ÖŸÖ (d) ˆ¯Ö¸üÖêŒŸÖ ´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà

KAU-07

23

Series-A

137. In an AC transmission line difference in phase of voltage at two ends of the line is due to (a) System voltage (b) Insulators (c) Resistance of line (d) Reactance of line 138. If 5000 kW power is transmitted at 220 kV in place of 11 kV, reduction in the value of electric current will be (a) 90% (b) 95% (c) 5% (d) 10% 139. In long AC transmission lines, the receiving end voltage becomes greater than sending end voltage at light load or no load operation. This is due to (a) Ferranti effect (b) Skin effect (c) Proximity effect (d) Corona effect 140. For extra high voltage ac transmission lines, conductors used are (a) All aluminium (b) All steel (c) AAAC (d) ACSR 141. Which of the following relations is true for long transmission line ? (b) VS = BVR + AIR (a) VS = AVR – BIR (c) VS = AVR + BIR (d) VS = BVR – AIR 142. Which of the following is used for power factor improvement in transmission line ? (a) Three phase induction (b) An overexcited three phase synchronous motor running on no load (c) Three phase AC series motor (d) Choke 143. The connected load of a consumer is 2 kW and his maximum demand is 1.5 kW. The load factor of the consumer is (a) 0.375 (b) 0.75 (c) 1.33 (d) None of these 144. If diameter of each conductor of a transmission line is ‘d’, then the diameter of n-layer stranded conductor will be (a) (2n – 1) d (b) (2n + 1) d (c) (3n – 1) d (d) (3n + 1) d 145. The bundled conductor in EHV transmission line system provides (a) increased inductance (b) reduced capacitance (c) increased capacitance (d) increased voltage gradient 146. Corona losses in transmission lines are minimized when (a) conductor size is reduced. (b) smooth conductor is used. (c) sharp points are provided in the line. (d) current density in conductor is reduced. 147. The power loss in a transmission line depends on (a) current in the line. (b) resistance of the line. (c) length of the line. (d) All of the above 148. The main consideration for operating transmission line at high voltage is (a) to increase efficiency only. (b) to reduce power loss only. (c) to increase power transmission capability only. (d) All of the above 149. The presence of earth in case of overhead transmission line (a) increases capacitance (b) increases inductance (c) decreases capacitance (d) decreases inductance 150. Effect of increase in temperature in an overhead transmission line is (a) to increase stress and length both (b) to decrease stress and length both (c) to decrease stress and increase length (d) None of the above Series-A

24

KAU-07

137.

138.

‹Ûú ¯ÖÏ.¬ÖÖ. ¯ÖÖ¸êüÂÖÞÖ »ÖÖ‡®Ö ´Öë »ÖÖ‡®Ö Ûêú ¤üÖê®ÖÖë ×ÃÖ¸üÖë ¯Ö¸ü ¾ÖÖê»™êü•ÖÖë Ûêú Ûú»ÖÖ ´Öë †ÓŸÖ¸ü ÛúÖ ÛúÖ¸üÞÖ Æîü (b) ×¾ÖªãŸÖ¸üÖê׬ֆÖë (a) ŸÖÓ¡Ö ¾ÖÖê»™êü•Ö (c) »ÖÖ‡®Ö ÛúÖ ¯ÖÏןָüÖê¬Ö (d) »ÖÖ‡®Ö ÛúÖ ¯ÖÏן֑ÖÖŸÖ µÖפü 5000 kW ¿Ö׌ŸÖ 11 kV Ûêú ãÖÖ®Ö ¯Ö¸ü 220 kV ¯Ö¸ü ¯ÖÖ¸êü×ÂÖŸÖ Ûúß •ÖÖµÖ, ŸÖÖê ×¾ÖªãŸÖ ¬ÖÖ¸üÖ Ûêú ´ÖÖ®Ö ´Öë Ûú´Öß ÆüÖêÝÖß (a)

139.

140.

143. 144.

95%

AAAC

»Ö´²Öß ¯ÖÖ¸êüÂÖÞÖ »ÖÖ‡®Ö ´Öë ×®Ö´®Ö ÃÖ´²ÖÓ¬ÖÖë ´Öë ÃÖê ÛúÖî®Ö ÃÖÖ (a) (c)

142.

(b)

(c)

147.

148.

149.

150.

(d)

10%

VS = AVR – BIR VS = AVR + BIR

(d) ACSR ÃÖŸµÖ Æîü ? (b) VS = BVR + AIR (d) VS = BVR – AIR

¯ÖÖ¸êüÂÖÞÖ »ÖÖ‡®Ö ´Öë ¿Ö׌ŸÖ ÝÖãÞÖÖÓÛú ÃÖã¬ÖÖ¸ü®Öê Ûêú ×»Ö‹ ×®Ö´®Ö ´Öë ÃÖê ÛúÖî®Ö ÃÖÖ ¯ÖϵÖÖêÝÖ ×ÛúµÖÖ •ÖÖŸÖÖ Æîü ? (a) סÖÛú»ÖÖ ¯ÖÏê¸üÞÖ ´ÖÖê™ü¸ü (b) ¿Öæ®µÖ ³ÖÖ¸ü ¯Ö¸ü “Ö»ÖŸÖê Æãü‹ †×ŸÖ ˆ¢Öê×•ÖŸÖ ×¡ÖÛú»ÖÖ ŸÖ㻵ÖÛúÖ»Öß ´ÖÖê™ü¸ü (c) סÖÛú»ÖÖ ¯ÖÏ.¬ÖÖ. ÁÖêÞÖß ´ÖÖê™ü¸ü (d) “ÖÖêÛú ‹Ûú ˆ¯Ö³ÖÖꌟÖÖ ÛúÖ ÃÖÓµÖÖê×•ÖŸÖ ³ÖÖ¸ü 2 kW Æîü †Öî¸ü ˆÃÖÛúß †×¬ÖÛúŸÖ´Ö ´ÖÖÑÝÖ 1.5 kW Æîü … ˆ¯Ö³ÖÖꌟÖÖ ÛúÖ ³ÖÖ¸ü ÝÖãÞÖÖÓÛú Æîü (a) 0.375 (b) 0.75 (c) 1.33 (d) ‡®Ö´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà µÖפü ‹Ûú ¯ÖÖ¸êüÂÖÞÖ »ÖÖ‡®Ö ´Öë ¯ÖÏŸµÖêÛú “ÖÖ»ÖÛú ÛúÖ ¾µÖÖÃÖ ‘d’ ÆüÖê, ŸÖÖê n-ÃÖŸÖÆü Ûêú ÙÒêü®›ü›ü “ÖÖ»ÖÛú ÛúÖ ¾µÖÖÃÖ ÆüÖêÝÖÖ

(a) (2n – 1) d (b) (2n + 1) d 145. EHV ¯ÖÖ¸êüÂÖÞÖ ŸÖÓ¡Ö ´Öë ²ÖÓ›ü»Ö “ÖÖ»ÖÛú ¯ÖϤüÖ®Ö Ûú¸üŸÖÖ Æîü (a) ¾ÖéרüŸÖ ¯ÖÏê¸üÛúŸ¾Ö (b) »Ö‘ÖãÛéúŸÖ ¬ÖÖ׸üŸÖÖ 146.

5%

»Ö´²Öß ¯ÖÏ.¬ÖÖ. ¯ÖÖ¸êüÂÖÞÖ »ÖÖ‡®ÖÖë ´Öë Æü»ÖÛêú ³ÖÖ¸ü †£Ö¾ÖÖ ¿Öæ®µÖ ³ÖÖ¸ü ¯ÖÏ“ÖÖ»Ö®Ö ¯Ö¸ü ÝÖÏÖÆüß ×ÃÖ¸êü ÛúÖ ¾ÖÖê»™êü•Ö ¯ÖÏêÂÖß ×ÃÖ¸êü Ûêú ¾ÖÖê»™êü•Ö ÃÖê †×¬ÖÛú ÆüÖê •ÖÖŸÖÖ Æîü … ‡ÃÖÛúÖ ÛúÖ¸üÞÖ Æî :ü (a) ±êú¸üÖÓŸÖß ¯ÖϳÖÖ¾Ö (b) ×ÃÛú®Ö ¯ÖϳÖÖ¾Ö (c) ¯ÖÏÖê׌ÃÖ×´Ö™üß ¯ÖϳÖÖ¾Ö (d) ÛúÖê¸üÖê®ÖÖ ¯ÖϳÖÖ¾Ö †×ŸÖ ˆ““Ö ¾ÖÖê»™êü•Ö ¯ÖÏ.¬ÖÖ. ¯ÖÖ¸êüÂÖÞÖ »ÖÖ‡®ÖÖë ´Öë ¯ÖϵÖãŒŸÖ “ÖÖ»ÖÛú Æîü (a) ÃÖ³Öß ‹»µÖã×´Ö×®ÖµÖ´Ö (b) ÃÖ³Öß Ã™üᯙ (c)

141.

90%

(c)

(3n – 1) d

(d)

(3n + 1) d

(c)

¾ÖéרüŸÖ ¬ÖÖ׸üŸÖÖ

(d)

¾ÖéרüŸÖ ¾ÖÖê»™êü•Ö ¯ÖϾÖÞÖŸÖÖ

¯ÖÖ¸êüÂÖÞÖ »ÖÖ‡®ÖÖë ´Öë ÛúÖê¸üÖê®ÖÖ ÆüÖ×®ÖµÖÖÑ Ûú´Ö Ûúß •ÖÖŸÖß Æîü •Ö²Ö (a) “ÖÖ»ÖÛú ÛúÖ †ÖÛúÖ¸ü ‘Ö™üÖ ×¤üµÖÖ •ÖÖŸÖÖ Æîü … (b) דÖÛú®ÖÖ “ÖÖ»ÖÛú ¯ÖϵÖÖêÝÖ ×ÛúµÖÖ •ÖÖŸÖÖ Æîü … (c) »ÖÖ‡®Ö ´Öë ŸÖßõÞÖ ×²Ö®¤ãü ²Ö®ÖÖµÖê •ÖÖŸÖê ÆîüÓ … (d) “ÖÖ»ÖÛú ´Öë ¬ÖÖ¸üÖ ‘Ö®ÖŸ¾Ö ‘Ö™üÖ ×¤üµÖÖ •ÖÖŸÖÖ Æîü … ¯ÖÖ¸êüÂÖÞÖ »ÖÖ‡®Ö ´Öë ¿Ö׌ŸÖ õÖµÖ ×®Ö³ÖÔ¸ü Ûú¸üŸÖÖ Æîü (a) »ÖÖ‡®Ö ´Öë ¬ÖÖ¸üÖ (b) »ÖÖ‡®Ö ÛúÖ ¯ÖÏןָüÖê¬Ö (c) »ÖÖ‡®Ö Ûúß »Ö´²ÖÖ‡Ô (d) ˆ¯Ö¸üÖêŒŸÖ ÃÖ³Öß ¯ÖÖ¸êüÂÖÞÖ »ÖÖ‡®Ö ÛúÖê ˆ““Ö ¾ÖÖê»™êü•Ö ¯Ö¸ü ¯ÖÏ“ÖÖ×»ÖŸÖ Ûú¸ü®Öê ÛúÖ ´ÖãÜµÖ ×¾Ö“ÖÖ¸ü Æîü (b) Ûêú¾Ö»Ö ¿Ö׌ŸÖ õÖµÖ ‘Ö™üÖ®Öê Ûêú ×»Ö‹ … (a) Ûêú¾Ö»Ö ¤üõÖŸÖÖ ²ÖœÌüÖ®Öê Ûêú ×»Ö‹ … (c) Ûêú¾Ö»Ö ¿Ö׌ŸÖ ¯ÖÖ¸êüÂÖÞÖ ÃÖÖ´Ö£µÖÔ ²ÖœÌüÖ®Öê Ûêú ×»Ö‹ … (d) ˆ¯Ö¸üÖêŒŸÖ ÃÖ³Öß Ûêú ×»Ö‹ ׿ָüÖê¯Ö׸ü ¯ÖÖ¸êüÂÖÞÖ »ÖÖ‡®Ö ´Öë ³Öæ×´Ö Ûúß ˆ¯Ö×ãÖ×ŸÖ (a) ¬ÖÖ׸üŸÖÖ ²ÖœÌüÖŸÖß Æîü … (b) ¯ÖÏê¸üÛúŸ¾Ö ²ÖœÌüÖŸÖß Æîü … (c) ¬ÖÖ׸üŸÖÖ ‘Ö™üÖŸÖß Æîü … (d) ¯ÖÏê¸üÛúŸ¾Ö ‘Ö™üÖŸÖß Æîü … ׿ָüÖê¯Ö׸ü ¯ÖÖ¸êüÂÖÞÖ »ÖÖ‡®Ö ´Öë ŸÖÖ¯ÖÛÎú´Ö ²ÖœÌü®Öê ÛúÖ ¯ÖϳÖÖ¾Ö Æîü (a) ¯ÖÏ×ŸÖ²Ö»Ö †Öî¸ü »Ö´²ÖÖ‡Ô ¤üÖê®ÖÖë ÛúÖê ²ÖœÌüÖ®ÖÖ … (b) ¯ÖÏ×ŸÖ²Ö»Ö †Öî¸ü »Ö´²ÖÖ‡Ô ¤üÖê®ÖÖë ÛúÖê ‘Ö™üÖ®ÖÖ … (c) ¯ÖÏ×ŸÖ²Ö»Ö ‘Ö™üÖ®ÖÖ †Öî¸ü »Ö´²ÖÖ‡Ô ²ÖœÌüÖ®ÖÖ … (d) ˆ¯Ö¸üÖêŒŸÖ ´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà

KAU-07

25

Series-A

151. A 0-10 A ammeter has a guaranteed accuracy of 1% of full scale deflection, the limiting error while reading 2.5 A will be (a) 1% (b) 2% (c) 4% (d) None of these 152. The constant of a given energymeter is 500 revolution/kWh. At the test 4.4 kW full load, meter completes 50 revolutions in 86 seconds. The percentage error of the meter is (a) –4.86% (b) 4.86% (c) 2.0% (d) 3.0% 153. The most efficient form of damping employed in electric instruments is (a) Air friction damping (b) Fluid friction damping (c) Eddy current damping (d) None of the above 154. Which of the following instruments is equally accurate on ac as well as dc circuits ? (a) PMMC voltmeter (b) Dynamometer wattmeter (c) Moving iron ammeter (d) Induction wattmeter 155. The moving system of an indicating type of electrical instrument is subjected to (a) a deflecting torque (b) a controlling torque (c) a damping torque (d) All of the above 156. Energy meter runs slowly even if power is not used. This error is called (a) Speed error (b) Phase error (c) Creeping error (d) None of these 157. The type of instruments used mainly for standardizing instruments in laboratories is (a) Indicating instrument (b) Integrating instrument (c) Absolute instrument (d) Recording instrument 158. What will happen if a voltmeter is connected like an ammeter in series of the load ? (a) The meter will burn out. (b) The measurement will be too high. (c) The same current will flow as would have been with ammeter in circuit. (d) There will be almost no current in the circuit. 159. Series resistance required to read 0-250 V with a moving coil instrument of internal resistance 2 ohm and full scale deflection of 50 mA is (a) 49998 Ω (b) 4998 Ω (c) 498 Ω (d) 49.8 Ω 160. Which of the following is not a method of resistance measurement ? (a) Ammeter – Voltmeter method (b) Post – Office box method (c) Ohm – Meter method (d) Two wattmeter method 161. Internal resistance of a micro-ammeter is 500 ohm. Shunt resistance required to increase its range from 0-100 µA to 0-10 A will be approximately (a) 0.05 Ω (b) 0.005 Ω (c) 0.5 Ω (d) 5.0 Ω 162. Hay bridge is suitable for measuring following type of inductance (a) having Q greater than 10. (b) having Q less than 10. (c) having any value of Q. (d) having phase angle of reactance very large. 163. The dielectric loss of a capacitance can be measured by (a) Hay bridge (b) Maxwell bridge (c) Anderson bridge (d) Schering bridge 164. In a particular meter, the deflecting torque is directly proportional to the current flowing through it, the type of meter is (a) moving coil (b) moving iron (c) induction (d) electro-static 165. For measurement of low resistance, the bridge used is (a) Wheatstone (b) Kelvin (c) Maxwell (d) Anderson

Series-A

26

KAU-07

151. 152.

‹Ûú 0-10 A ¬ÖÖ¸üÖ´ÖÖ¯Öß Ûúß ×®Ö׿“ÖŸÖ µÖ£ÖÖ£ÖÔŸÖÖ ¯ÖæÞÖÔ ÃÛêú»Ö ×¾ÖõÖê¯Ö ¯Ö¸ü 1% Æîü … 2.5 A ¯ÖÖšËüµÖÖÓÛú Ûêú ×»Ö‹ ÃÖß´ÖÖ®ŸÖ ¡Öã×™ü ÆüÖêÝÖß (a) 1% (b) 2% (c) 4% (d) ‡®Ö´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà ‹Ûú פüµÖê ÝÖµÖê ‰ú•ÖÖÔ´ÖÖ¯Öß ÛúÖ ×ãָüÖÓÛú 500 “ÖŒÛú¸ü/kWh Æîü … 4.4 kW ¯ÖæÞÖÔ ³ÖÖ¸ü ¯Ö¸üßõÖÞÖ ¯Ö¸ü ´ÖÖ¯Öß 50 “ÖŒÛú¸ü 86 ÃÖêÛÓú›ü ´Öë ¯Öæ¸üÖ Ûú¸üŸÖÖ Æîü … ´ÖÖ¯Öß Ûúß ¯ÖÏ×ŸÖ¿ÖŸÖ ¡Öã×™ü Æîü (a)

153.

154.

155.

156. 157. 158.

159.

161.

163.

164. 165.

4.86%

(c)

2.0%

(d)

3.0%

49998 Ω

(b)

4998 Ω

(c)

498 Ω

(d)

49.8 Ω

×®Ö´®Ö ´Öë ÃÖê ÛúÖî®Ö ÃÖß ¯ÖÏןָüÖê¬Ö ´ÖÖ¯Ö®Ö Ûúß ×¾Ö×¬Ö ®ÖÆüà Æîü ? (b) ¯ÖÖêÙü-†Öò×±úÃÖ ²ÖÖòŒÃÖ ×¾Ö×¬Ö (a) ¬ÖÖ¸üÖ´ÖÖ¯Öß-¾ÖÖê»™ü´ÖÖ¯Öß ×¾Ö×¬Ö (c) †Öê´Ö-´Öß™ü¸ü ×¾Ö×¬Ö (d) ¤üÖê ¿Ö׌ŸÖ´ÖÖ¯Öß ×¾Ö×¬Ö ‹Ûú ÃÖæõ´Ö ¬ÖÖ¸üÖ´ÖÖ¯Öß ÛúÖ †ÖÓŸÖ׸üÛú ¯ÖÏןָüÖê¬Ö 500 †Öê´Ö Æîü … ‡ÃÖÛúÖ ¯Ö¸üÖÃÖ 0-100 µA ÃÖê 0-10 A ²ÖœÌüÖ®Öê Ûêú ×»Ö‹ ¿ÖÓ™ü ¯ÖÏןָüÖê¬Ö »ÖÝÖ³ÖÝÖ ÆüÖêÝÖÖ (a)

162.

(b)

¾ÖîªãŸÖ ˆ¯ÖµÖÓ¡ÖÖë ´Öë ÃÖ¾ÖÖÔ׬ÖÛú ¤üõÖ ¯ÖÏÛúÖ¸ü ÛúÖ †¾Ö´ÖÓ¤ü®Ö ¯ÖϵÖÖêÝÖ ÆüÖêŸÖÖ Æîü (a) ¾ÖÖµÖã ‘ÖÂÖÔÞÖ †¾Ö´ÖÓ¤ü®Ö (b) ¦ü¾Ö ‘ÖÂÖÔÞÖ †¾Ö´ÖÓ¤ü®Ö (c) ³ÖѾָü ¬ÖÖ¸üÖ †¾Ö´ÖÓ¤ü®Ö (d) ˆ¯Ö¸üÖêŒŸÖ ´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà ×®Ö´®Ö ˆ¯ÖµÖÓ¡ÖÖë ´Öë ÃÖê ÛúÖî®Ö ÃÖÖ ×¤ü.¬ÖÖ. †Öî¸ü ¯ÖÏ.¬ÖÖ. ¯Ö׸ü¯Ö£ÖÖë ´Öë ÃÖ´ÖÖ®Ö ºþ¯Ö ÃÖê µÖ£ÖÖ£ÖÔ Æîü ? (a) PMMC ¾ÖÖê»™ü´ÖÖ¯Öß (b) ›üÖµÖ®Öê´ÖÖê´Öß™ü¸ü ¿Ö׌ŸÖ´ÖÖ¯Öß (c) “Ö»Ö-»ÖÖîÆü ¬ÖÖ¸üÖ´ÖÖ¯Öß (d) ¯ÖÏê¸üÞÖ ¿Ö׌ŸÖ´ÖÖ¯Öß ÃÖæ“ÖÛú ¯ÖÏÛúÖ¸ü Ûêú ¾ÖîªãŸÖ ˆ¯ÖµÖÓ¡Ö ÛúÖ “Ö»Ö ŸÖÓ¡Ö ¯Ö¸ü »ÖÝÖŸÖÖ Æîü (b) ‹Ûú ×®ÖµÖÓ¡ÖÞÖ ²Ö»Ö-†Ö‘ÖæÞÖÔ (a) ‹Ûú ×¾ÖõÖê¯Öß ²Ö»Ö-†Ö‘ÖæÞÖÔ (c) ‹Ûú †¾Ö´ÖÓ¤ü®Ö ²Ö»Ö-†Ö‘ÖæÞÖÔ (d) ˆ¯Ö¸üÖêŒŸÖ ÃÖ³Öß ¿Ö׌ŸÖ´ÖÖ¯Öß ¿Ö׌ŸÖ ˆ¯ÖµÖÖêÝÖ ®Ö Ûú¸ü®Öê ¯Ö¸ü ³Öß ¬Ö߸êü-¬Ö߸êü “Ö»ÖŸÖÖ Æîü … µÖÆü ¡Öã×™ü ÛúÆü»ÖÖŸÖß Æîü (a) “ÖÖ»Ö ¡Öã×™ü (b) Ûú»ÖÖ ¡Öã×™ü (c) ´ÖÓ¤ü ×¾Öºþ¯ÖÞÖ ¡Öã×™ü (d) ‡®Ö´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà ¯ÖϵÖÖêÝÖ¿ÖÖ»ÖÖ†Öë ´Öë ˆ¯ÖµÖÓ¡ÖÖë ÛúÖ ´ÖÖ®ÖÛúßÛú¸üÞÖ Ûêú ×»Ö‹ ´Öãֵܵ֟ÖÖ ¯ÖϵÖãŒŸÖ ˆ¯ÖµÖÓ¡ÖÖë ÛúÖ ¯ÖÏÛúÖ¸ü ÆîüÓ (a) ÃÖæ“ÖÛú ˆ¯ÖµÖÓ¡Ö (b) ÃÖ´ÖÖÛú»Ö®Öß ˆ¯ÖµÖÓ¡Ö (c) ×®Ö¸ü¯ÖêõÖ ˆ¯ÖµÖÓ¡Ö (d) †×³Ö»ÖêÜÖ®Ö ˆ¯ÖµÖÓ¡Ö ŒµÖÖ ÆüÖêÝÖÖ µÖפü ‹Ûú ¾ÖÖê»™ü´ÖÖ¯Öß ÛúÖê ¬ÖÖ¸üÖ´ÖÖ¯Öß Ûúß ŸÖ¸üÆü ³ÖÖ¸ü Ûêú ÁÖêÞÖß ÛÎú´Ö ´Öë ÃÖÓµÖÖê×•ÖŸÖ ×ÛúµÖÖ •ÖÖŸÖÖ ÆüÖê ? (a) ´ÖÖ¯Öß •Ö»Ö •ÖÖµÖêÝÖÖ … (b) ´ÖÖ¯Ö®Ö ²ÖÆãüŸÖ †×¬ÖÛú ÆüÖêÝÖÖ … (c) ˆŸÖ®Öß Æüß ¬ÖÖ¸üÖ ²ÖÆêüÝÖß ×•ÖŸÖ®Öß ×Ûú ¯Ö׸ü¯Ö£Ö ´Öë ¬ÖÖ¸üÖ´ÖÖ¯Öß ÆüÖê®Öê ¯Ö¸ü ²ÖÆü®Öß “ÖÖ×Æü‹ … (d) ¯Ö׸ü¯Ö£Ö ´Öë »ÖÝÖ³ÖÝÖ ÛúÖê‡Ô ¬ÖÖ¸üÖ ®ÖÆüà ÆüÖêÝÖß … 2 †Öê´Ö †ÖÓŸÖ׸üÛú ¯ÖÏןָüÖê¬Ö †Öî¸ü 50 mA ¯ÖæÞÖÔ ´ÖÖ¯ÖÛÎú´Ö ×¾ÖõÖê¯ÖÞÖ ¾ÖÖ»Öê ‹Ûú “Ö»Ö ÛãÓú›ü»Öß ˆ¯ÖµÖÓ¡Ö ÃÖê 0-250 V ¯ÖÖšËüµÖ Ûú¸ü®Öê Ûêú ×»Ö‹ †Ö¾Ö¿µÖÛú ÁÖêÞÖß ¯ÖÏןָüÖê¬Ö Æîü (a)

160.

– 4.86%

0.05 Ω

(b)

0.005 Ω

(c) ˆ¯ÖµÖãŒŸÖ Æîü : (b) (d)

0.5 Ω

(d)

5.0 Ω

Æêü ÃÖêŸÖã ×®Ö´®Ö ¯ÖÏÛúÖ¸ü Ûêú ¯ÖÏê¸üÛúŸ¾Ö Ûêú ´ÖÖ¯Ö®Ö Ûêú ×»Ö‹ (a) 10 ÃÖê †×¬ÖÛú Q ¾ÖÖ»Öê 10 ÃÖê Ûú´Ö Q ¾ÖÖ»Öê (c) Q Ûêú ×ÛúÃÖß ´ÖÖ®Ö ¾ÖÖ»Öê ¯ÖÏן֑ÖÖŸÖ Ûêú †ŸµÖ׬ÖÛú Ûú»ÖÖ ÛúÖêÞÖ ¾ÖÖ»Öê ×ÛúÃÖß ÃÖÓ¬ÖÖ׸ü¡Ö Ûúß ¯Ö¸üÖ¾ÖîªãŸÖ ÆüÖ×®Ö ´ÖÖ¯Öß •ÖÖ ÃÖÛúŸÖß Æîü (a) Æêü ÃÖêŸÖã ÃÖê (b) ´ÖîŒÃÖ¾Öê»Ö ÃÖêŸÖã ÃÖê (c) ‹®›ü¸üÃÖ®Ö ÃÖêŸÖã ÃÖê (d) ¿ÖêظüÝÖ ÃÖêŸÖã ÃÖê ×ÛúÃÖß ×®Ö׿“ÖŸÖ ´ÖÖ¯Öß ´Öë ×¾ÖõÖê¯ÖÞÖ ²Ö»Ö-†Ö‘ÖæÞÖÔ ‡ÃÖ´Öë ¯ÖϾÖÖ×ÆüŸÖ ÆüÖê®Öê ¾ÖÖ»Öß ¬ÖÖ¸üÖ Ûêú ÃÖ´ÖÖ®Öã¯ÖÖŸÖß Æîü, ´Öß™ü¸ü ÛúÖ ¯ÖÏÛúÖ¸ü Æîü (a) “Ö»Ö-ÛãÓú›ü»Öß (b) “Ö»Ö-»ÖÖîÆü (c) ¯ÖÏê¸üÞÖ (d) ¾ÖîªãŸÖ-ãÖîןÖÛú »Ö‘Öã ¯ÖÏןָüÖê¬Ö Ûêú ´ÖÖ¯Ö®Ö Ûêú ×»Ö‹ ¯ÖϵÖãŒŸÖ ÃÖêŸÖã Æîü (a) ¾Æüß™üÙüÖê®Ö (b) Ûêú×»¾Ö®Ö (c) ´ÖîŒÃÖ¾Öê»Ö (d) ‹®›ü¸üÃÖ®Ö

KAU-07

27

Series-A

166. While measuring power in a three phase load by two wattmeter method, the reading of two wattmeter are equal and opposite, when (a) load is balanced (b) power factor is unity (c) phase angle is between 60° to 90° (d) the load is purely inductive 167. Megger is used to measure (a) very high resistance or insulation resistance. (b) low resistance. (c) high resistance. (d) very low resistance. 168. If a dynamometer wattmeter is connected in an ac circuit, the power indicated by the wattmeter will be (a) volt-ampere product (b) average power (c) peak power (d) instantaneous power 169. The Maxwell bridge is used for measuring (a) Capacitance (b) Dielectric loss (c) Inductance (d) Phase angle 170. A compensated wattmeter has its reading corrected for error due to (a) Frequency (b) Friction (c) Power consumed in current coil (d) Power consumed in pressure coil 171. A null type of instrument as compared to a deflecting type instrument has (a) higher accuracy (b) lower sensitivity (c) faster response (d) All of the above 172. A digital voltmeter has a read-out range from 0 to 9999 counts. When full scale reading is 9.999 V, the resolution of the instrument will be (a) 100 mV (b) 99 mV (c) 9 mV (d) 1 mV 173. A VTVM can be used to measure (a) dc voltage only (b) ac voltage only (c) both (a) and (b) (d) None of the above 174. The sensitivity of a voltmeter using 0-5 mA meter movement is (a) 200 Ω/V (b) 150 Ω/V (c) 100 Ω/V (d) 50 Ω/V 175. Moving coil instruments have which one of the following scales ? (a) Logarithmic scale (b) Uniform scale (c) Non-uniform scale (d) Squared scale 176. Super conducting materials can be used for (a) ore refining. (b) magnetic levitation in high speed trains. (c) medical resonance imaging. (d) All of the above 177. Ferrites are types of (a) magnetic material (b) conducting material (c) semiconducting material (d) insulating material 178. In which material, valence electrons are tightly bounded to their parent atoms ? (a) Conductor (b) Semiconductor (c) Insulator (d) Magnetic 179. The disc of domestic supply energy meter is made of which material ? (a) Zinc (b) Copper (c) Aluminium (d) Silver 180. The material of hair spring used in measuring instruments is made of which of material of the following : (a) Copper (b) Bronze (c) Alnico (d) None of these ______________ Series-A

28

KAU-07

166.

167.

168.

169. 170.

171. 172.

סÖÛú»ÖÖ ³ÖÖ¸ü ´Öë ¤üÖê ¿Ö׌ŸÖ´ÖÖ¯Öß ×¾Ö×¬Ö ÃÖê ¿Ö׌ŸÖ ´ÖÖ¯Ö®Ö Ûêú ÃÖ´ÖµÖ ¤üÖê®ÖÖë ¿Ö׌ŸÖ-´ÖÖׯֵÖÖë ÛúÖ ¯ÖÖšËüµÖÖÓÛú ²Ö¸üÖ²Ö¸ü †Öî¸ü ×¾Ö¯Ö¸üßŸÖ Æîü, •Ö²Ö (a) ³ÖÖ¸ü ÃÖÓŸÖã×»ÖŸÖ Æîü … (b) ¿Ö׌ŸÖ ÝÖãÞÖÖÓÛú ‡ÛúÖ‡Ô Æîü … (c) Ûú»ÖÖ ÛúÖêÞÖ 60° †Öî¸ü 90° Ûêú ´Ö¬µÖ Æîü … (d) ³ÖÖ¸ü ¿Öã¨ü ºþ¯Ö ÃÖê ¯ÖÏê¸üÛúŸ¾ÖßµÖ Æîü … ´ÖêÝÖ¸ü ´ÖÖ¯Ö®Ö Ûêú ×»ÖµÖê ¯ÖϵÖÖêÝÖ ×ÛúµÖÖ •ÖÖŸÖÖ Æîü (a) †×ŸÖ ˆ““Ö ¯ÖÏןָüÖê¬Ö †£Ö¾ÖÖ ×¾ÖªãŸÖ¸üÖê¬Ö®Ö ¯ÖÏןָüÖê¬Ö (b) »Ö‘Öã ¯ÖÏןָüÖê¬Ö (c) ˆ““Ö ¯ÖÏןָüÖê¬Ö (d) †×ŸÖ »Ö‘Öã ¯ÖÏןָüÖê¬Ö µÖפü ‹Ûú ›üÖµÖ®Öê´ÖÖê´Öß™ü¸ü ¿Ö׌ŸÖ´ÖÖ¯Öß ‹Ûú ¯ÖÏ.¬ÖÖ. ¯Ö׸ü¯Ö£Ö ´Öë »ÖÝÖÖµÖÖ •ÖÖŸÖÖ Æîü, ŸÖÖê ¿Ö׌ŸÖ´ÖÖ¯Öß «üÖ¸üÖ ÃÖæ×“ÖŸÖ ¿Ö׌ŸÖ ÆüÖêÝÖß (a) ¾ÖÖê»™ü-‹×´¯ÖµÖ¸ü ÛúÖ ÝÖãÞÖ®Ö (b) †ÖîÃÖŸÖ ¿Ö׌ŸÖ (c) ׿ÖÜÖ¸ü ¿Ö׌ŸÖ (d) ŸÖÖŸÛúÖ×»ÖÛú ¿Ö׌ŸÖ ´ÖîŒÃÖ¾Öê»Ö ÃÖêŸÖã ¯ÖϵÖÖêÝÖ ×ÛúµÖÖ •ÖÖŸÖÖ Æî ´ÖÖ¯Ö®Ö Ûêú ×»Ö‹ü (a) ¬ÖÖ׸üŸÖÖ (b) ¯Ö¸üÖ¾ÖîªãŸÖ ÆüÖ×®Ö (c) ¯ÖÏê¸üÛúŸ¾Ö (d) Ûú»ÖÖ ÛúÖêÞÖ ‹Ûú ¯ÖÏןÖÛúÖ׸üŸÖ ¿Ö׌ŸÖ´ÖÖ¯Öß ´Öë ‡ÃÖÛêú ¯ÖÖšËüµÖÖÓÛú ÛúÖê ÃÖã¬ÖÖ¸üÖ •ÖÖŸÖÖ Æîü ¡Öã×™ü Ûêú ×»Ö‹ וÖÃÖÛúÖ ÛúÖ¸üÞÖ Æîü (a) †Ö¾Öé×¢Ö (b) ‘ÖÂÖÔÞÖ (c) ¬ÖÖ¸üÖ ÛãÓú›ü»Öß ´Öë ˆ¯Ö³ÖÖêÝÖ Ûúß ÝÖµÖß ¿Ö׌ŸÖ (d) ¾ÖÖê»™êü•Ö ÛãÓú›ü»Öß ´Öë ˆ¯Ö³ÖÖêÝÖ Ûúß ÝÖµÖß ¿Ö׌ŸÖ ‹Ûú ¿Öæ®µÖ ¯ÖÏÛúÖ¸ü Ûêú ˆ¯ÖµÖÓ¡Ö ´Öë ‹Ûú ×¾ÖõÖê¯ÖÞÖ ¯ÖÏÛúÖ¸ü Ûêú ˆ¯ÖµÖÓ¡Ö Ûúß ŸÖã»Ö®ÖÖ ´Öë Æîü (a) ˆ““ÖŸÖ¸ü µÖ£ÖÖ£ÖÔŸÖÖ (b) ×®Ö´®ÖŸÖ¸ü ÃÖãÝÖÏÖÆËüµÖŸÖÖ (c) ŸÖß¾ÖΟָü †®Öã×ÛÎúµÖÖ (d) µÖÆü ÃÖ³Öß ‹Ûú †ÓÛúÛú ¾ÖÖê»™ü´ÖÖ¯Öß ÛúÖ ¯ÖϤüÖµÖß ¯Öšü®Ö ¯Ö¸üÖÃÖ 0 ÃÖê 9999 ÝÖÞÖ®ÖÖÓÛú Æîü … •Ö²Ö ¯ÖæÞÖÔ ´ÖÖ¯ÖÛÎú´Ö ¯ÖÖšËüµÖÖÓÛú 9.999 V Æîü, ŸÖÖê ˆ¯ÖµÖÓ¡Ö ÛúÖ ×¾Ö³Öê¤ü®Ö ÆüÖêÝÖÖ (a)

173.

174.

176.

177.

178. 179. 180.

(b)

99 mV

(c)

9 mV

(d)

1 mV

‹Ûú VTVM ¯ÖϵÖÖêÝÖ ×ÛúµÖÖ •ÖÖ ÃÖÛúŸÖÖ Æîü ®ÖÖ¯Ö®Öê ×Ûú ×»Ö‹ (b) Ûêú¾Ö»Ö ¯ÖÏ.¬ÖÖ. ¾ÖÖê»™êü•Ö (a) Ûêú¾Ö»Ö פü.¬ÖÖ. ¾ÖÖê»™êü•Ö (c) (a) †Öî¸ü (b) ¤üÖê®ÖÖë (d) ˆ¯Ö¸üÖêŒŸÖ ´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà 0-5 mA ´Öß™ü¸ü ‘Öã´ÖÖ¾Ö ÛúÖ ¯ÖϵÖÖêÝÖ Ûú¸üÛêú ‹Ûú ¾ÖÖê»™ü´ÖÖ¯Öß Ûúß ÃÖãÝÖÏÖÆ˵ÖüŸÖÖ Æîü (a)

175.

100 mV

200 Ω/V

(b)

150 Ω/V

(c)

100 Ω/V

(d)

50 Ω/V

“Ö»Ö-ÛãÓú›ü»Öß ˆ¯ÖµÖÓ¡ÖÖë ´Öë ×®Ö´®Ö ´ÖÖ¯ÖÛÎú´ÖÖë ´Öë ÛúÖî®Ö ÃÖÖ Æîü ? (a) »Ö‘ÖãÝÖÞÖÛúßµÖ ´ÖÖ¯ÖÛÎú´Ö (b) ‹ÛúÃÖ´ÖÖ®Ö ´ÖÖ¯ÖÛÎú´Ö (d) ¾ÖÝÖÖÔÛúÖ׸üŸÖ ´ÖÖ¯ÖÛÎú´Ö (c) †ÃÖ´ÖÖ®Ö ´ÖÖ¯ÖÛÎú´Ö †×ŸÖ-“ÖÖ»ÖÛú ¯Ö¤üÖ£ÖÔ ¯ÖϵÖÖêÝÖ ×ÛúµÖê •ÖÖ ÃÖÛúŸÖê Æïü (a) †µÖÃÛú †×¬Ö¿ÖÖê¬Ö®Ö Ûêú ×»Ö‹ (b) ˆ““Ö ÝÖ×ŸÖ ¸êü»ÖÖë ´Öë “Öã´²ÖÛúßµÖ ˆŸ£ÖÖ¯Ö®Ö Ûêú ×»Ö‹ (c) דÖ×ÛúŸÃÖßµÖ †®Öã®ÖÖ¤ü ¯ÖÏןÖײִ²Ö Ûêú ×»Ö‹ (d) ˆ¯Ö¸üÖêŒŸÖ ÃÖ³Öß ±êú¸üÖ‡™ËüÃÖ ¯ÖÏÛúÖ¸ü Æîü (a) “Öã´²ÖÛúßµÖ ¯Ö¤üÖ£ÖÔ ÛúÖ (b) “ÖÖ»ÖÛú ¯Ö¤üÖ£ÖÔ ÛúÖ (c) †¨Ôü“ÖÖ»ÖÛú ¯Ö¤üÖ£ÖÔ ÛúÖ (d) ×¾ÖªãŸÖ¸üÖê¬Öß ¯Ö¤üÖ£ÖÔ ÛúÖ ×ÛúÃÖ ¯Ö¤üÖ£ÖÔ ´Öë ÃÖÓµÖÖê•Ö®Ö ‡»ÖꌙÒüÖò®Ö †¯Ö®Öê •Ö®ÖÛú ¯Ö¸ü´ÖÖÞÖã†Öë ÃÖê ´Ö•Ö²ÖæŸÖß ÃÖê ÃÖ´²Ö¨ü ¸üÆüŸÖê ÆîüÓ ? (a) “ÖÖ»ÖÛú (b) †¨Ôü“ÖÖ»ÖÛú (c) ×¾ÖªãŸÖ¸üÖê¬Öß (d) “Öã´²ÖÛúßµÖ ‘Ö¸êü»Öæ ¯ÖϤüÖµÖ ‰ú•ÖÖÔ´ÖÖ¯Öß Ûúß ×›üÃÛú ×ÛúÃÖ ¯Ö¤üÖ£ÖÔ Ûúß ²Ö®Öß ÆüÖêŸÖß Æîü ? (a) Ø•ÖÛú (•ÖßÖÖ) (b) ŸÖÖѲÖÖ (c) ‹»µÖã×´Ö×®ÖµÖ´Ö (d) “ÖÖѤüß ´ÖÖ¯Ö®Ö ˆ¯ÖµÖÓ¡ÖÖë ´Öë ¯ÖϵÖãŒŸÖ ŸÖ®Öã Ûú´ÖÖ®Öß ÛúÖ ¯Ö¤üÖ£ÖÔ ×®Ö´®Ö ´Öë ÃÖê ×ÛúÃÖ ¯Ö¤üÖ£ÖÔ Ûúß ²Ö®Öß ÆüÖêŸÖß Æîü ? (a) ŸÖÖѲÖÖ (b) ÛúÖÑÃµÖ (c) ‹ê×»®ÖÛúÖêê (d) ‡®Ö´Öë ÃÖê ÛúÖê‡Ô ®ÖÆüà ______________

KAU-07

29

Series-A

Space For Rough Work / ¸ü±ú ÛúÖµÖÔ Ûêú ×»Ö‹ •ÖÝÖÆ

Series-A

30

KAU-07

Space For Rough Work / ¸ü±ú ÛúÖµÖÔ Ûêú ×»Ö‹ •ÖÝÖÆ

KAU-07

31

Series-A

J.E. Exam - 2013 Electrical Engineering Paper-1.pdf

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