Electrical Engineering MCQs

Page No. 113

When SCR is OFF, the current in the circuit is ________________?


aExactly zero


bSmall leakage current


c Large leakage current


dNone of the above


View Answer Small leakage current

We can control a.c. power in a load by connecting ______________?


aTwo SCRs in series


b Two SCRs in parallel


cTwo SCRs in parallel opposition


dNone of the above



If firing angle in an SCR circuit is increased, the output _____________?


aRemains the same


b Is increased


c Is decreased


dNone of the above


View Answer Is decreased

An SCR can exercise control over____________of a.c. supply?


aPositive half-cycles only


b Negative half-cycles only


cBoth positive and negative half-cycles


dPositive or negative half-cycles



When SCR starts conducting, then _____________ loses all control?


a Gate


bCathode


c Anode


dNone of the above


View Answer Gate

The Q of a tuned amplifier is generally _________________?The Q of a tuned amplifier is generally _________________?


aLess than 5


b Less than 10


cMore than 10


dNone of the above


View Answer More than 10

For frequencies below resonant frequency, a series LC circuit behaves as a _____________ load?


aResistive


b Capacitive


c Inductive


dNone of the above


View Answer Capacitive

Tuned class C amplifiers are used for RF signals of________________?


aLow power


bHigh power


cVery high power


dNone of the above


View Answer None of the above

Double tuned circuits are used in ____________ stages of a radio receiver?


aIF


bAudio


cOutput


d None of the above


View Answer IF

In the double tuned circuit, if the mutual inductance between the two tuned circuits is decreased, the level of resonance curve ___________________?


a Remains the same


bIs lowered


c Is raised


dNone of the above


View Answer Is raised

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