Define sensitivity of Wheatstone bridge. What is the criterion for balance of a Wheatstone bridge? In what two types of circuits do Wheatstone bridges find most of their applications? What are the limitations of Wheatstone bridge?
or ld
b)
Compare and contrast Successive approximation type of DVM and Dual slope type of DVM Prove that in case of dual slope integrator the clock accuracy is not going to affect the measurement accuracy. [8+8]
[4x4]
What are the sources of error in the measurement of Q of a coil. How are they taken care of? A coil with a resistance of 0.1 ohm is connected in the “direct measurement” mode. Resonance occurs when the oscillator frequency is 40 MHz and the value of capacitor is 135 pF. Calculate the percentage error introduced in the calculated value of Q by the 0.02 ohm insertion resistance. [10+6]
uW
1.a)
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JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD III .B.TECH –II SEM SUPPLEMENTARY EXAMINATIONS JANUARY- 2010 ELECTRONIC MEASUREMENT & INSTRUMENTATION (COMMON TO ECE & ETM) Time: 3hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks ---
What are the different types of extending frequency range of a frequency counter? Explain any two methods generally used to extend the frequency range of a frequency counter. [8+8]
5.a).
Explain the significance of the following Lissajous figures. i). Straight line ii). Ellipse iii). Circle Discuss the following display modes of dual-trace CRO. i) A and B chopped. ii) A and B Alternate An electrically deflected CRT has a final anode voltage if 2000V and parallel deflecting plates 1.5cm long and 5mm apart. If the screen is 50cm from the centre of deflecting plates. Find (a) beam speed (b) the deflection sensitivity of the tube and (c) the deflection factor of the tube. [4+6+4]
nt
4.a) b)
b).
Aj
c).
6.a). b).
Explain the reproducing process of analog recordings. Discuss about magnetic materials for tape.
[8+8]
7.a) b) c) d)
What are the advantages and disadvantages of LDTV? What is differential output of LDTV and explain the errors involved in the measurements using LDTV. [8+8] --ooOoo--
Aj
nt
uW
or ld
.in
8.a) b)
Explain piezoelectric effect. What are the materials that show piezoelectric effect? What are the materials belonging to natural and synthetic group of piezo electric materials? Draw the structure of piezoelectric crystal. [4x4]
Code.No: 26021
RR
SET-2
b)
What are the sources of error in the measurement of Q of a coil. How are they taken care of? A coil with a resistance of 0.1 ohm is connected in the “direct measurement” mode. Resonance occurs when the oscillator frequency is 40 MHz and the value of capacitor is 135 pF. Calculate the percentage error introduced in the calculated value of Q by the 0.02 ohm insertion resistance. [10+6]
or ld
1.a)
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JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD III .B.TECH –II SEM SUPPLEMENTARY EXAMINATIONS JANUARY- 2010 ELECTRONIC MEASUREMENT & INSTRUMENTATION (COMMON TO ECE & ETM) Time: 3hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks ---
What are the different types of extending frequency range of a frequency counter? Explain any two methods generally used to extend the frequency range of a frequency counter. [8+8]
3.a).
Explain the significance of the following Lissajous figures. i). Straight line ii). Ellipse iii). Circle Discuss the following display modes of dual-trace CRO. i) A and B chopped. ii) A and B Alternate An electrically deflected CRT has a final anode voltage if 2000V and parallel deflecting plates 1.5cm long and 5mm apart. If the screen is 50cm from the centre of deflecting plates. Find (i) beam speed (ii) the deflection sensitivity of the tube and (iii) the deflection factor of the tube. [4+6+4]
b).
c).
uW
2.a) b)
Explain the reproducing process of analog recordings. Discuss about magnetic materials for tape.
5.a) b) c)
Explain piezoelectric effect. What are the materials that show piezoelectric effect? What are the materials belonging to natural and synthetic group of piezo electric materials? Draw the structure of piezoelectric crystal. [4x4]
Aj
nt
4.a). b).
d)
6.a) b)
[8+8]
What are the advantages and disadvantages of LDTV? What is differential output of LDTV and explain the errors involved in the measurements using LDTV. [8+8]
b)
8.a) b) c) d)
Compare and contrast Successive approximation type of DVM and Dual slope type of DVM Prove that in case of dual slope integrator the clock accuracy is not going to affect the measurement accuracy. [8+8] Define sensitivity of Wheatstone bridge. What is the criterion for balance of a Wheatstone bridge? In what two types of circuits do Wheatstone bridges find most of their applications? What are the limitations of Wheatstone bridge?
Aj
nt
uW
or ld
--ooOoo--
[4x4]
.in
7.a)
Code.No: 26021
SET-3
RR
b).
c).
Explain the significance of the following Lissajous figures. i). Straight line ii). Ellipse iii). Circle Discuss the following display modes of dual-trace CRO. i) A and B chopped. ii) A and B Alternate An electrically deflected CRT has a final anode voltage if 2000V and parallel deflecting plates 1.5cm long and 5mm apart. If the screen is 50cm from the centre of deflecting plates. Find (i) beam speed (ii) the deflection sensitivity of the tube and (iii) the deflection factor of the tube. [4+6+4]
or ld
1.a).
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JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD III .B.TECH –II SEM SUPPLEMENTARY EXAMINATIONS JANUARY- 2010 ELECTRONIC MEASUREMENT & INSTRUMENTATION (COMMON TO ECE & ETM) Time: 3hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks ---
2.a). b).
Explain the reproducing process of analog recordings. Discuss about magnetic materials for tape.
3.a) b) c)
Explain piezoelectric effect. What are the materials that show piezoelectric effect? What are the materials belonging to natural and synthetic group of piezo electric materials? Draw the structure of piezoelectric crystal. [4x4] What are the advantages and disadvantages of LDTV? What is differential output of LDTV and explain the errors involved in the measurements using LDTV. [8+8]
nt
4.a) b)
uW
d)
[8+8]
5.a)
Aj
b)
Compare and contrast Successive approximation type of DVM and Dual slope type of DVM Prove that in case of dual slope integrator the clock accuracy is not going to affect the measurement accuracy. [8+8]
6.a) b) c)
d)
Define sensitivity of Wheatstone bridge. What is the criterion for balance of a Wheatstone bridge? In what two types of circuits do Wheatstone bridges find most of their applications? What are the limitations of Wheatstone bridge?
[4x4]
b)
8.a) b)
What are the sources of error in the measurement of Q of a coil. How are they taken care of? A coil with a resistance of 0.1 ohm is connected in the “direct measurement” mode. Resonance occurs when the oscillator frequency is 40 MHz and the value of capacitor is 135 pF. Calculate the percentage error introduced in the calculated value of Q by the 0.02 ohm insertion resistance. [10+6] What are the different types of extending frequency range of a frequency counter? Explain any two methods generally used to extend the frequency range of a frequency counter. [8+8]
Aj
nt
uW
or ld
--ooOoo--
.in
7.a)
Code.No: 26021
SET-4
RR
1.a) b) c) d)
.in
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD III .B.TECH –II SEM SUPPLEMENTARY EXAMINATIONS JANUARY- 2010 ELECTRONIC MEASUREMENT & INSTRUMENTATION (COMMON TO ECE & ETM) Time: 3hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks --Explain piezoelectric effect. What are the materials that show piezoelectric effect? What are the materials belonging to natural and synthetic group of piezo electric materials? Draw the structure of piezoelectric crystal. [4x4]
What are the advantages and disadvantages of LDTV? What is differential output of LDTV and explain the errors involved in the measurements using LDTV. [8+8]
3.a)
Compare and contrast Successive approximation type of DVM and Dual slope type of DVM Prove that in case of dual slope integrator the clock accuracy is not going to affect the measurement accuracy. [8+8]
4.a) b) c) d) 5.a)
What are the different types of extending frequency range of a frequency counter? Explain any two methods generally used to extend the frequency range of a frequency counter. [8+8]
Aj
6.a) b)
[4x4]
What are the sources of error in the measurement of Q of a coil. How are they taken care of? A coil with a resistance of 0.1 ohm is connected in the “direct measurement” mode. Resonance occurs when the oscillator frequency is 40 MHz and the value of capacitor is 135 pF. Calculate the percentage error introduced in the calculated value of Q by the 0.02 ohm insertion resistance. [10+6]
nt
b)
Define sensitivity of Wheatstone bridge. What is the criterion for balance of a Wheatstone bridge? In what two types of circuits do Wheatstone bridges find most of their applications? What are the limitations of Wheatstone bridge?
uW
b)
or ld
2.a) b)
b).
c).
8.a). b).
Explain the significance of the following Lissajous figures. i). Straight line ii). Ellipse iii). Circle Discuss the following display modes of dual-trace CRO. i) A and B chopped. ii) A and B Alternate An electrically deflected CRT has a final anode voltage if 2000V and parallel deflecting plates 1.5cm long and 5mm apart. If the screen is 50cm from the centre of deflecting plates. Find (i) beam speed (ii) the deflection sensitivity of the tube and (iii) the deflection factor of the tube. [4+6+4] Explain the reproducing process of analog recordings. Discuss about magnetic materials for tape.
[8+8]
Aj
nt
uW
or ld
--ooOoo--
.in
7.a).
Code.No: 26021
c) In what two types of circuits do Wheatstone bridges find most of their · applications? ... Calculate the percentage error introduced in the calculated · value of Q .... ii). Ellipse iii). Circle b). Discuss the following display modes of dual-trace CRO.
