Anna University Chennai 2005 B.E Mechanical Engineering /B.TECH :Electronics Engineering - Question Paper

B.E/B.TECH. DEGREE exam ,NOV/DEC 2005
2nd semester, Mechanical engineering
Electronics Engineering


Time:3 Hrs
Maximum: 100 marks


PART A (10 X two =20)

1. describe (a)extrensic semiconductor (b) intrinsic sermiconductor.

2. With regard to rectifiers describe ripple factor

3. What is meant by faithful amplification?How is it achieved?

4. State the applications of tuned amplifiers.

5. Bring out the difference bipolar junction and field effect transistors.

6. Specify the significance of negative feedback.

7. provide the merits and demerits of RC and LC oscillators

8. State barkhausen criterion.

9. Briefly discuss the working of JK flip flop.

10. State and prove Demorgans' theorem.

PART B (5 X 16 =80)

11. With neat circuit diagram discuss the working of Wien bridge oscillator

12. (a) With necessary input and output waeforms discuss the working of a center tapped full wave rectifier

OR

(b) discuss the V-I charecteristics of zener diode and show its act as a voltage regulator

13. (a) For common base and common emitter configurations draw the circuit and discuss their input ,output charecteristics

OR

(b) discuss the class B power amplifier with circuit

14 (a) define the working of unijunction transistor and discuss any 1 of its application

OR

(b) define the operation of SCR and discuss its V-I charecteristics

15 (a) With neat circuit diagram discuss the working of an astable multivibrator

OR

(b) Design a full adder and implement it using logic gates.

Earning:   Approval pending.