# Oscillators – 1 MCQ’s

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?
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 5 Star
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