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 230 V load draws 10 A at power factor 0.8. Its real power is?

Show AnswerHide Answer Report an error

Correct Answer: A. 1.84 kW

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

Reference: Standard measurements and instrumentation: power measurement

Question 2

Measurements & InstrumentationPower Measurement

Show AnswerHide Answer Report an error

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 3

Measurements & InstrumentationPower Measurement

Show AnswerHide Answer Report an error

Correct Answer: A. VI cosφ

Explanation: Real power is P=Vrms Irms cosφ.

Reference: Standard measurements and instrumentation: power measurement