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MCQs 1: Most of the amplification in a superhetrodyne receiver occurs at ______________stage?

IF RF amplifier Audio amplifier Detector
Answer Explanation

MCQs 2: If a radio receiver amplifies all the signal frequencies equally well, it is said to have high ________________?

Sensitivity Selectivity Distortion Fidelity
Answer Explanation

MCQs 3: The letters AVC stand for ________________?

Audio voltage control Abrupt voltage control Automatic volume control Automatic voltage control
Answer Explanation

MCQs 4: In superhetrodyne receiver, the input at mixer stage is________________?

IF and RF RF and AF IF and AF RF and local oscillator signal
Answer Explanation

MCQs 5: When the modulating signal controls the frequency of the carrier, we get______________?

Phase modulation Amplitude modulation Frequency modulation May be any one of the above
Answer Explanation

MCQs 6: The IF is 455 kHz. If the radio receiver is tuned to 855 kHz, the local oscillator frequency is _______________?

455 kHz 1310 kHz 1500 kHz 1520 kHz
Answer Explanation

MCQs 7: The function of ferrite antenna is to_________________?

Reduce stray capacitance Stabilise d.c. bias Increase the Q of tuned circuit Reduce noise
Answer Explanation

MCQs 8: A 100 V carrier is made to vary between 160 V and 40 V by the signal. What is the modulation factor ?

3 6 5 None of the above
Answer Explanation

MCQs 9: If Amin = 40 and Amax = 60, what is the percentage of modulation?

20 % 40 % 50 % 10 %
Answer Explanation

MCQs 10: In a radio receiver, we generally use ………….. oscillator as a local oscillator

Crystal Wien-bridge Phase-shift Hartley
Answer Explanation

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