This set of Analog Electronic Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Distortion in Amplifier-2″.

1. THD is a measure of ____________

a) Amount of harmonic content present in a signal

b) Amount of output power

c) Total amount of distortion

d) Total amount of amplitude distortion

2. The ratio of the RMS amplitude of the higher order harmonic frequencies to the RMS amplitude of the fundamental frequency is commonly called __________

a) Total harmonic power

b) Total amplitude distortion

c) Total frequency distortion

d) Total harmonic distortion

3. THD+N is a scale used to expressing _______ of an audio amplifier.

a) Gain

b) Sound quality

c) Amplification factor

d) Distortion

4. Intermodulation distortion is caused by __________

a) Presence of harmonic components in signal

b) Non- linearity of biasing circuit

c) Non-linearity of amplifier

d) High frequency signal

5. Second order harmonic distortion is __________

a) Amount of second harmonics and first harmonics in signal

b) Amount of second harmonics and fourth harmonics in signal

c) Amount of second harmonics present in signal

d) RMS value of all even harmonics in signal

6. In three-point method the harmonics which are considered for calculating distortion is __________

a) First harmonics only

b) First and Second harmonics only

c) First, Second and Third harmonics only

d) Second and Third harmonics only

7. The ratio of the RMS value of additional frequency components in output to the RMS value of the original output of the amplifier is called __________

a) Intermodulation distortion

b) Total amplitude distortion

c) Total frequency distortion

d) Total harmonic distortion

8. Power delivered to load is _________ with an increase in harmonic distortion.

a) Increases

b) Decreases

c) Constant

d) Cannot predict

9. If D1, D2, D3, D4 are the distortion produced by second, third, fourth, fifth respectively (others are insignificant). Then total harmonic distortion is __________

a) √(D1^{2}+D2^{2}+D3^{2}+D4^{2})

b) √(D1^{2}+D3^{2})

c) √(D2^{2}+D4^{2})

d) √(D1^{2}+D2^{2})

10. Power delivered to load calculated by five-point method can be equal to __________

(P_{ac} is power delivered to load without distortion and D is the RMS of all Harmonic distortion)

a) P_{ac} (1-D2)

b) P_{ac}/D2

c) P_{ac} (1+D2)

d) P_{ac} D2