Alternating Current Ques 43
43. In an $A.C.$ circuit with voltage $V$ and current $I$ the power dissipated is
[1997]
(a) dependent on the phase between $V$ and $I$
(b) $\frac{1}{\sqrt{2}} VI$
(c) $\frac{1}{2} VI$
(d) $VI$
Show Answer
Answer:
Correct Answer: 43.(a)
Solution:
- (a) Power dissipated $=E _{\text{rms }} \cdot I _{\text{rms }}$
$=(E _{rms})(I _{rms}) \cos \theta$
Hence, power dissipated depends upon phase difference.
BETA
