AR13 Code: 13EE2003

MODEL QUESTION PAPER

ADITYA INSTITUTE OF TECHNOLOGY AND MANAGEMENT, TEKKALI (AUTONOMOUS) II B.Tech I Semester Regular Examinations, 2014-2015 ELECTRICAL AND ELECTRONICS ENGINEERING (Common to CSE & IT Branches) Time – 3 hours

Max. Marks: 70 PART – A

Answer all the questions 1). a) b) c) d) e) f) g) h) i) j)

[10X1M = 10M]

Define electric potential Define ohms law Principle of D.C generator Applications of series motor EMF equation of alternator Principle of 1-ф trans former What are the differences between MI&MC type instrument s Different types of PMMI instrument Diode applications. Symbol of SCR

PART – B Answer one question from each unit

[5x12=60 M] UNIT-I

2)

a) Series & parallel combination circuits of a) Resistance

b) inductor

b) Explain with example a) KCL B) KVL

[6M+6M] (OR)

3) a) Find total current and power in a given circuit.

b) Find total resistance in a circuit between A&B

[6M+6M]

UNIT-II 4)

a) principle operation of D.C generator and example with single loop generator b) Derive EMF equation of D.C generator

[6M+6M] (OR)

5)

a) what are the advantage of 3-pointers starter and explain with neat sketch. b) What are the different parts in D.C MACHINE?

[6M+6M]

Unit-III 6) a) what is principle operation of 1-ф trans former b) Derive EMF equation of 3- ф Alternator

[6M+6M] (OR)

7) a) Procedure for O.C & S.C test on 1-ф trans former b) Explain speed torque characteristics of 3- ф induction motor

[6M+6M]

Unit-IV 8) 9)

Principle operation of PMMC instrument

[12M]

(OR) Principle operation of PMMI type instrument

[12M]

Unit-V 10)

a) explain V&I characteristics of P-n junction diode b) Explain V&I characteristics of SCR

[6M+6M] (OR)

11) a) Explain about full wave rectifier b) Construction of NPN and PNP transistors ***

[6M+6M]

ELECTRICAL AND ELECTRONICS ENGINEERING (Common to CSE and IT) Subject Code: 13 EE2003 Credits: 03

External Marks: 70 Internal Marks: 30

COURSE OBJECTIVES: The course is designed with the objective to provide students: • basic practical knowledge of electric devices and components. • knowledge about DC and AC machines. • knowledge about Instruments. • knowledge about the characteristics of devices like PN junction diode. COURSE OUTCOMES: Students are expected to: • Learn the physical recognition of different electrical components like Resistances, Inductances, Capacitances and their ratings. • Have learnt the verifications of basic laws of electric circuits like Ohm’s law and Kirchhoff’s laws. • Connect electric circuits, and able to use electric instruments to perform experiments. • Have learnt about DC and AC machines. • Have good practical knowledge of electric and electronic circuits, components.

UNIT-I ELECTRICAL CIRCUITS: Basic definitions, Types of elements, Ohm’s Law, elements R, Land C and their V-I relationships & symbols, Resistive networks, Kirchhoff’s Laws, Inductive networks, Capacitive networks, Series, Parallel circuits and Star-delta and delta-star transformations, simple problems. UNIT II DC MACHINES : Principle of operation of DC Generator, construction, emf equation, types & characteristics of DC generators, Principle of operation of DC motor, types, torque equation, characteristics losses, efficiency, testing of DC motors, applications, three point starter. UNIT III TRANSFORMERS & AC MACHINES: Principle of operation of single phase transformers, emf equation, losses, efficiency and regulation. Principle of operation of alternator, emf equation, regulation by synchronous impedance method. Principle of operation of induction motor, slip, torque characteristics, applications.

UNIT IV INSTRUMENTS: Basic Principle of indicating instruments, types of instruments, operation of permanent magnet moving coil and moving iron instruments. UNIT V DIODE AND TRANSISTOR CHARACTERISTICS P-N junction diode, symbol, V-I Characteristics, Diode Applications, Rectifiers – Half wave, Full wave and Bridge rectifiers(simple Problems). P-N-P and N-P-N Junction transistor, Transistor as an amplifier, SCR characteristics and applications. TEXT BOOKS: 1. Essentials of Electrical and Computer Engineering by David V. Kerns, JR. J. David Irwin.

2. Principles of Electrical and Electronics Engineering by V.K.Mehta, S.Chand& Co. REFERENCE BOOKS: 1. Introduction to Electrical Engineering – M.S Naidu and S. Kamakshaiah, TMH Publ.

2. Basic Electrical Engineering by Kothari and Nagarath, TMH Publications, 2nd Edition.