Electro Magnetic Induction And Alternating Currents Question 99
Question: In an ac circuit with voltage V and current I, the power dissipated is [CBSE PMT 1997]
Options:
A) VI
B) $ \frac{1}{2}VI $
C) $ \frac{1}{\sqrt{2}}VI $
D) Depends on the phase between V and I
Show Answer
Answer:
Correct Answer: D
Solution:
$ \because P=Vi\cos \varphi , $
$ \therefore P\propto \cos \varphi $
