Frequency Response of Amplifiers - Electronic Engineering (MCQ) questions & answers

1)   Which capacitors assists in preventing the loss of gain due to negative feedback without affecting the DC stability of R-C Coupled amplifier?

a. Coupling capacitors (Cc)
b. Bypass capacitors (CE)
c. Both a and b
d. None of the above
Answer  Explanation 

ANSWER: Bypass capacitors (CE)

Explanation:
No explanation is available for this question!
2)   Which among the following is not an advantage of RC coupled amplifiers?

a. High fidelity
b. No core distortion
c. No impedance matching
d. Wide frequency response
Answer  Explanation 

ANSWER: No impedance matching

Explanation:
No explanation is available for this question!
3)   Which among the below mentioned circuits resemble its behaviour similar to that of an amplifier in high frequency region, as the response decreases with an increase in frequency?

a. Simple high pass circuit
b. Simple low pass circuit
c. Simple band pass circuit
d. Simple band stop circuit
Answer  Explanation 

ANSWER: Simple low pass circuit

Explanation:
No explanation is available for this question!
4)   The rate of -20 dB/decade is almost equivalent to __________

a. -4 dB/octave
b. -6 dB/octave
c. -8 dB/octave
d. -10 dB/octave
Answer  Explanation 

ANSWER: -6 dB/octave

Explanation:
No explanation is available for this question!
5)   Fidelity is nothing but an ability of amplifier to reproduce ________

a. Input signal without any distortion
b. Output signal without any distortion
c. Phase shift signal
d. Amplitude shift signal
Answer  Explanation 

ANSWER: Input signal without any distortion

Explanation:
No explanation is available for this question!
6)   The value of dBm in power measurement is estimated by assuming the reference ,which is equal to ________

a. 1mW
b. 10mW
c. 1/10 mW
d. 1/100 mW
Answer  Explanation 

ANSWER: 1mW

Explanation:
No explanation is available for this question!
7)   What should be the gain of an amplifier at 20 kHz if the half power frequencies are fL = 20 Hz and fH = 15 kHz along with mid band gain = 80?

a. 28.28
b. 48.07
c. 62.47
d. 78.77
Answer  Explanation 

ANSWER: 48.07

Explanation:
No explanation is available for this question!
8)   Which region/s in frequency response curve of an amplifier maintains the constant level of gain and output voltage?

a. Low Frequency Region
b. Mid Frequency Region
c. High Frequency Region
d. All of the above
Answer  Explanation 

ANSWER: Mid Frequency Region

Explanation:
No explanation is available for this question!
9)   What does an arrow indicate in the below drawn schematic for frequency response curve of RC coupled amplifier?

a. Ideal Frequency Response
b. Practical Frequency Response
c. Both a and b
d. None of the above
Answer  Explanation 

ANSWER: Practical Frequency Response

Explanation:
No explanation is available for this question!

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