Electrical Engineering MCQs

Page No. 15

If the power level of an amplifier reduces to half, the db gain will fall by___________?


a5 db

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b 2db

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c10 db

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d 3 db

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View Answer 3 db

In the initial stages of a multistage amplifier, we use______________?


aRC coupling

✓


bTransformer coupling

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cDirect coupling

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dNone of the above

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View Answer RC coupling

A gain of 1,000,000 times in power is expressed by_____________?


a 30 db

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b60 db

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c120 db

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d600 db

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View Answer 60 db

In transistor amplifiers, we use_____________transformer for impedance matching?


aStep up

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b Step down

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cSame turn ratio

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dNone of the above

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View Answer Step down

If a three-stage amplifier has individual stage gains of 10 db, 5 db and 12 db, then total gain in db is____________?


a600 db

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b24 db

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c14 db

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d27 db

✓


View Answer 27 db

Transformer coupling is generally employed when load resistance is______________?


aLarge

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bVery large

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cSmall

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d None of the above

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View Answer Small

_____________coupling provides the maximum voltage gain?


aRC

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bTransformer

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cDirect

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dImpedance

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View Answer Transformer

In RC coupling, the value of coupling capacitor is about_______________?


a 100 pF

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b0.1 µF

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c0.01 µF

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d10 µF

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View Answer 10 µF

The best frequency response is of_____________coupling?


aRC

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bTransformer

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c Direct

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dNone of the above

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View Answer Direct

In obtaining the frequency response curve of an amplifier, the______________?


aAmplifier level output is kept constant

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bAmplifier frequency is held constant

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cGenerator frequency is held constant

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dGenerator output level is held constant

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