250+ TOP MCQs on Selectivity and Answers

Basic Electrical Engineering Multiple Choice Questions on “Selectivity”.

1. Shape of the resonance curve depends upon the?
A. Q-factor
B. Voltage
C. Current
D. Either voltage or current
Answer: A
Clarification: The shape of the resonance curve depends on the Q factor because of the equation:
Q=Resonance frequency / Bandwidth. Sharp resonance means high quality factor.

2. A circuit is said to be selective if it has a _____ peak and ____ bandwidth.
A. Blunt, narrow
B. Sharp, narrow
C. Sharp, broad
D. Blunt, broad
Answer: B
Clarification: For a circuit to be selective, it should have high quality factor. And we know that for high quality factor, resonance frequency should be high(peak should be sharp) and bandwidth should be narrow.

3. What is the Q factor of a selective circuit?
A. Very low
B. Very high
C. Zero
D. Infinity
Answer: B
Clarification: For a circuit to be selective, it should have high quality factor. It should have a sharp peak with narrow bandwidth.

4. In selective circuits, higher the Q factor _________ the peak.
A. Sharper
B. Blunter
C. Neither sharper nor blunter
D. Either sharper or blunter
Answer: A
Clarification: Q=Resonance frequency / Bandwidth.
Higher the quality factor, sharper the peak of resonance curve.

5. Q is a measure of _________
A. Resonance
B. Bandwidth
C. Selectivity
D. Either resonance or bandwidth
Answer: C
Clarification: For a circuit to be selective, it should have a high quality factor. It should have a sharp peak with narrow bandwidth.

6. In selective circuits, the resonant frequency lies in the ________ of the bandwidth frequency range.
A. Beginning
B. End
C. Midpoint
D. Cannot be determined