Electrical Engineering MCQs

Page No. 113

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


aExactly zero

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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

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b Two SCRs in parallel

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cTwo SCRs in parallel opposition

✓


dNone of the above

✖



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


aRemains the same

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b Is increased

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c Is decreased

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dNone of the above

✖


View Answer Is decreased

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


aPositive half-cycles only

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b Negative half-cycles only

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cBoth positive and negative half-cycles

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dPositive or negative half-cycles

✓



When SCR starts conducting, then _____________ loses all control?


a Gate

✓


bCathode

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c Anode

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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

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b Less than 10

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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

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b Capacitive

✓


c Inductive

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dNone of the above

✖


View Answer Capacitive

Tuned class C amplifiers are used for RF signals of________________?


aLow power

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bHigh power

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cVery high power

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dNone of the above

✓


View Answer None of the above

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


aIF

✓


bAudio

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cOutput

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d None of the above

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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

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bIs lowered

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c Is raised

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dNone of the above

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View Answer Is raised

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