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
