# Instrumentation Transducers Questions and Answers – Oscillators and Signal Generators

This set of Instrumentation Transducers Multiple Choice Questions & Answers (MCQs) focuses on “Oscillators and Signal Generators”.

1. Which of the following signals are generated by Wien-bridge oscillators?
a) Square wave
b) Sine wave
c) Triangular wave
d) Pulse wave

Explanation: Wien-bridge oscillators are sinusoidal wave generators.

2. In a Wien-bridge oscillator for obtaining 160Hz frequency output what will be the capacitor value if resistance is selected as 1KΩ?
a) 10 µF
b) 1 µF
c) 1 nF
d) 10 nF

Explanation: Frequency of oscillation in Wien-bridge oscillator is given as 1/(2πRC), by simply substituting value we obtain a result.

3. In a Wien-bridge oscillator, frequency of oscillation and capacitor value have ____________________
a) Direct proportionality
b) Inverse proportionality
c) Equality
d) No relation

Explanation: From the relation of f = 1/(2πRC), it is clear that frequency and capacitance have inverse proportionality.

4. Which of the following device is a non-linear device?
a) Resistance
b) Diode
c) Op-amp
d) Capacitor

Explanation: Non-linear devices have a non-linear relation between input and output.

5. In RC phase shift oscillator, one R-C bridge provides ___________ phase shift.
a) 300
b) 600
c) 900
d) 1800

Explanation: Each R-C bridge in RC phase shift oscillator provides 600 phase shift to circuit.
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6. Which of the following oscillators have higher stability at a higher frequency?
a) Wien-bridge oscillator
b) RC phase shift oscillator
c) Crystal oscillator
d) All of the mentioned

Explanation: Crystal oscillators show greater stability at higher operating frequencies.

7. Which of the following can be considered as oscillation frequency controlling element in RC phase shift oscillator?
a) Resistance
b) Capacitor
c) Both resistor and capacitor
d) None of the mentioned

Explanation: Both resistor and capacitor values affect the frequency of oscillation of RC phase shift oscillator.

8. Which of the following represents the LC tuned circuit?
a) Wien bridge oscillator
b) T oscillator
c) Hartley oscillator
d) All of the mentioned

Explanation: Hartley and Colpitts oscillators are made up of inductors and capacitors and they are known as LC tuned circuits.

9. Which of the following can be used to produce a square waveform?
a) Wien bridge oscillators
b) T-oscillator
c) Hartley oscillator
d) Multivibrators

Explanation: Multivibrators are known as square wave generators since they produce square waves.

10. Pulse wave and square wave are the same in all aspect.
a) True
b) False

Explanation: Pulse wave and square wave are different in their mean level, in which square wave have zero as mean level.

Sanfoundry Global Education & Learning Series – Instrumentation Transducers.

To practice all areas of Instrumentation Transducers, here is complete set of 1000+ Multiple Choice Questions and Answers.

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