Electro Magnetic Induction And Alternating Currents Question 100

Question: For an ac circuit $ V=15\sin \omega t $ and $ I=20\cos \omega t $ the average power consumed in this circuit is [RPET 1999]

Options:

A) 300 Watt

B) 150 Watt

C) 75 Watt

D) zero

Show Answer

Answer:

Correct Answer: D

Solution:

$ P=V_{rms}I_{rms}\cos \varphi ;\ \sin ce\ \varphi =90^{o}. $ So P = 0



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