B.Sc. DEGREE EXAMINATION, NOVEMBER 2017
Aircraft Maintenance Science
PRINCIPLE OF ELECTRONICS AND
ELECTRONIC CIRCUITS
(Upto 2015 Batch)
Time 3 Hours Maximum 75 Marks
Part A x 3 15)
Answer any five questions.
1. Define capacitance. Give its unit.
2. What do you mean by Q-factor of a coil?
3. What is meant by intrinsic semiconductor? Give
examples.
4. Give three pentavalent impurities.
5. Define pinch off voltage in FET.
6. Mention some uses of UJT.
7. What is a class B amplifier?
8. State Barkhausen criteria for oscillation.
Sub. Code
21
CP-7810
2
Ws5
Part B x 12 60)
Answer all questions.
9. Write a note on
Fixed resistor
Variable resistor
Colour coding.
Or
Find the effective value of two inductances
connected in
Series
Parallel.
10. Describe the working of pn junction diode under
forward and reverse bias. Hence discuss its V-I
characteristics.
Or
Describe the method of studying the characteristics
of an NPN transistor under CE configuration.
11. Explain the construction and V-I characteristics of
FET.
Or
Describe the construction and V-I characteristics of
DIAC.
CP-7810
3
Ws5
12. With a neat circuit diagram, explain the operation
of class A-amplifiers.
Or
Draw and explain the operation of complementary
pair amplifier.
13. Draw the circuit diagram of a Hartley oscillator and
explain its working.
Or
With a neat circuit diagram, explain the working of
Wein bridge oscillator.
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