Which instrument is based on induction principle? - Measurements and Instrumentation

Electronics and Communication Engineering (ECE) : Measurements and Instrumentation - Quiz(MCQ)

Which instrument is based on induction principle?

Dynamometer wattmeter

Induction wattmeter

Energy meter

Both (B) and (C)

Correct Answer : Option (D) : Both (B) and (C)

Explanation : Energy meter is also based on induction principle.

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compensate for error in voltmeter

compensate for change in temperature

compensate for resistance of strain gauge

compensate for error due to change in voltage of battery

Correct Answer : compensate for change in temperature

A CT is used to feed current coils of wattmeter, energy meter, power factor meter and an ammeter. Then

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the coils are in series-parallel

all the coils are in series

None of the above

Correct Answer : all the coils are in series

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dc value

peak value

true rms value

rms plus dc value

Correct Answer : dc value