Electrical Engineering MCQs

Page No. 118

In the above question, what is the power in sidebands ?


a 8 kW


b6 kW


c06 kW


d9 kW


View Answer 06 kW

Modulation refers to a low-frequency signal controlling the ________________?


aAmplitude of the carrier


b Frequency of the carrier


cPhase of the carrier


dMay be any of the above



The major advantage of FM over AM is__________________?


aReception is less noisy


bHigher carrier frequency


cSmaller bandwidth


dSmall frequency deviation



Superhertodyne principle refers to_________________?


aUsing a large number of amplifier stages


bUsing a push-pull circuit


cObtaining lower fixed intermediate frequency


dNone of the above



The superhetrodyne principle provides selectivity at ______________stage?


aRF


bIF


caudio


d Before RF


View Answer IF

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


aIF


b RF amplifier


cAudio amplifier


dDetector


View Answer IF

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


aSensitivity


bSelectivity


cDistortion


dFidelity


View Answer Fidelity

The letters AVC stand for ________________?


a Audio voltage control


bAbrupt voltage control


cAutomatic volume control


dAutomatic voltage control



In superhetrodyne receiver, the input at mixer stage is________________?


aIF and RF


b RF and AF


cIF and AF


dRF and local oscillator signal



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


aPhase modulation


b Amplitude modulation


cFrequency modulation


dMay be any one of the above


View Answer Frequency modulation

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