Power Measurement MCQs

Practice Power Measurement MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1

Measurements & InstrumentationPower Measurement

A single-phase electrodynamometer wattmeter measures?

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Correct Answer: A. Real power

Explanation: A wattmeter's average deflecting torque is proportional to the average product of voltage and current, corresponding to real power.

Reference: Standard measurements and instrumentation: power measurement

Question 2

Measurements & InstrumentationPower Measurement

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Correct Answer: A. VI cosφ

Explanation: Real power is P=Vrms Irms cosφ.

Reference: Standard measurements and instrumentation: power measurement

Question 3

Measurements & InstrumentationPower Measurement

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Correct Answer: A. 1.84 kW

Explanation: P=230×10×0.8=1840 W=1.84 kW.

Reference: Standard measurements and instrumentation: power measurement