Q210
A wattmeter will read zero under the following condition
A.
The voltage and current are exactly in phase
B.
The voltage and current have the same time periods but the voltage is sinusoidal whereas the current is a square wave
C.
the voltage frequency is twice the current frequency
D.
The current is dc and the voltage is sinusoidal
AnswerAnswer: Option D
Solution
Answer: Option D
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