An induction wattmeter can be used for - Measurements and Instrumentation

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

An induction wattmeter can be used for

dc only

50 Hz ac only

both ac and dc

high frequency ac only

Correct Answer : Option (B) : 50 Hz ac only

Explanation : Induction principle is valid for ac only. Induction Instruments are calibrated for 50 Hz ac.

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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

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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

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true rms value

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Correct Answer : dc value