Electro Magnetic Induction And Alternating Currents Question 95
Question: In an ac circuit, the current is given by $ i=5\sin ,( 100,t-\frac{\pi }{2} ) $ and the ac potential is $ V=200\sin ,(100),volt. $ Then the power consumption is [CBSE PMT 1995; MH CET 1999; CPMT 2002]
Options:
A) 20 watts
B) 40 watts
C) 1000 watts
D) 0 watt
Show Answer
Answer:
Correct Answer: D
Solution:
$ P=Vi\cos \varphi $ Phase difference $ \varphi =\frac{\pi }{2}\Rightarrow P=zero $
