Oscillators – 1 MCQ’s

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This set of Electronic Devices & Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Oscillators – 1″.

1. Give the relation between output and input voltage of an oscillator?
a) Av = Vi/Vo
b) Vi = Vo Av
c) Vo = Av/Vi
d) Av = Vo/Vi

2. What is the value of self-oscillating circuits?
a) 0
b) 1
c) 2
d) 3

3. What are oscillators?
a) Switching circuits
b) Converts dc to ac
c) Converts ac to dc
d) Filter circuits

4. What is the value of input voltage, if Aβ=1 and input voltage is 5V?
a) 0
b) 2
c) 5
d) 10

5. For practical oscillators, which law has to be obeyed?
a) Faraday law
b) Hertz law
c) Fleming law
d) Barkhausen law

6. Barkhausen criteria states phase of loop gain must be 0 for a self sustaining oscillator.
a) True
b) False

7. For an oscillator, input voltage is 5V, loop gain is 2, find output voltage?
a) 10
b) 20
c) 5
d) 15

8. Which of the following expression depicts Barkhausen criteria?
a) Aβ = 1
b) Aβ = 0
c) Aβ < 1 < Aβ
d) Aβ < 1

9. What is the average value of saturation factor in a practical circuit?
a) 1
b) 0
c) 2
d) 3

10. An oscillator requires an input voltage of high amplitude.
a) True
b) False

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