Important questions / expected questions for Nov Dec 2016 GE6252 Basic Electrical and Electronics Engineering examinations conducting by Anna University Chennai

B.E./ B.Tech. DEGREE EXAMINATION Nov Dec 2016

02nd Semester / II Semester / I Year

Mechanical Engineering / Civil Engineering

GE6252 Basic Electrical and Electronics Engineering

(Regulation 2013)

Nov Dec 2016 Important Questions

Important 16 Marks / Part B Questions (All five units) are listed for GE6252 Basic Electrical and Electronics Engineering Subject

1. An A.C circuit consists of a pure resistance and an inductive coil connected in series. The power dissipated in the resistance and in the coil are 1000W and 200W respectively. The voltage drops across the resistance and the coil are 200V and 300V respectively. Calculate the following:- (i) Value

of the pure resistance, (ii) Current through the circuit, (iii) Resistance of the coil, (iv) Impedance of the coil, (v) Reactance of the coil and supply voltage.

B.E./ B.Tech. DEGREE EXAMINATION Nov Dec 2016

02nd Semester / II Semester / I Year

Mechanical Engineering / Civil Engineering

GE6252 Basic Electrical and Electronics Engineering

(Regulation 2013)

Nov Dec 2016 Important Questions

Important 16 Marks / Part B Questions (All five units) are listed for GE6252 Basic Electrical and Electronics Engineering Subject

1. An A.C circuit consists of a pure resistance and an inductive coil connected in series. The power dissipated in the resistance and in the coil are 1000W and 200W respectively. The voltage drops across the resistance and the coil are 200V and 300V respectively. Calculate the following:- (i) Value

of the pure resistance, (ii) Current through the circuit, (iii) Resistance of the coil, (iv) Impedance of the coil, (v) Reactance of the coil and supply voltage.

2. Draw and explain the followings: Dynamometer type watt meter. Mention its advantages and disadvantages.

3. Draw and explain the operation of permanent magnet moving iron and moving coil type instruments with neat diagrams. Obtain an expression for its deflecting torque.

4. Derive the expression for phase angle in the R-L series circuit, R-C series circuit and R-L-C series circuit. (16)

5. Using Mesh analysis, find the current through the various branches in the circuit of the following figure. (16)

6. Discuss the construction and working principle of a D.C Generator with neat diagram.

7. Derive the EMF equation of a D.C Generator.

8. Explain the operating principle of a D.C Motor. What is meant by back emf? What is its significance?

9. Explain the operating principle of a various types of single phase Induction Motor with neat diagram. Mention its applications also.

10. Explain the starting methods of single phase induction motor.

11. Draw and explain Zener Diode shunt voltage regulator with its line and load regulations. (16)

12. Explain Half wave rectifier with suitable circuit diagram and derive its efficiency, ripple factor, TUF and PIV.

13. Draw the three configurations of a bipolar junction transistor and Compare CE , CB and CC configuration.(16)

14. With help of relevant circuit diagram and V-I characteristics, show how a zener diode is used as a voltage regulator.

15. Explain the mechanism of avalanche breakdown and zener breakdown.

16. What is a sequential circuit? Explain the operation of Clocked RS flip flop and JK flip flop with suitable logic diagram.

17. (i) With neat diagrams explain the operation of a 4 – bit asynchronous counter. (8)

(ii) Draw a logic circuit for the function F=AB+ABC+AB (D+E) and simplify the expression.

18. What is a combinational circuit? Explain the operation of Half and Full Adder circuit and Implement the sum and carry using NAND gate.

19. (i) Realize the given expression using only NAND gates and Inverters. Y=ABC+A’B’C’.

(ii) Design a Full Adder, construct the truth table, simplify the output equations and draw the Logic Diagram.

20. Give a brief explanation of an A/D Conversion and the need for the A/D conversions.

21. With neat diagrams explain any one method of amplitude modulation and its corresponding demodulation?

22. Explain the with neat diagram the principle and working of AM and FM transmitter

23. (i) What is the need for modulation. Explain the principles behind amplitude modulation and frequency modulation. Compare and contrast the two types of modulation. (10)

(ii) Draw a typical TV signal. Explain how this is converted into an image on a TV screen. (6)

24. Explain satellite communication system&Draw the block diagram of radio broadcasting and reception system and explain the function of each block.

25. Explain frequency modulation. Obtain the mathematical representation of frequency modulation.

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