Second Harmonic Distortion MCQ’s

This set of Electronic Devices & Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Second Harmonic Distortion”.

1. What is the second harmonics of a wave form with fundamental frequency of 50Hz?
a) 50Hz
b) 150Hz
c) 25Hz
d) 100Hz

2. The second order harmonics is the most prominent even harmonic.
a) True
b) False

3. What is the cause of harmonic distortion in a power amplifier?
a) Exact replication of output signal
b) Perfectly synced harmonics
c) Non-linearity of transistors
d) Linearity of transistors

4. What is the total harmonic distortion if the amplitude of first harmonic distortion is 20dB and second harmonic distortion 25dB?
a) 1.2
b) 1.52
c) 1.25
d) 1.5

5. What reduces the second harmonic distortion?
a) Amplifiers
b) Demodulators
c) Modulators
d) Transistor switch arrays

6. Which of the following configuration classes has the lowest second order harmonics?
a) Class A
b) Class AB
c) Class B
d) Class C

7. What is the signal to noise ratio (SNR) of a second harmonic wave if the input signal amplitude is 20dB and the output signal amplitude is 25dB?
a) 0.8
b) 0.5
c) 1.25
d) 1.5

8. What is the unit of second harmonic distortion?
a) Ampere
b) dBc
c) Volts
d) Watts

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