SATHEE: Alternating Current - Result Question 8

Alternating Current - Result Question 8

8. 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) $\frac{1}{\sqrt{2}} V I$

(d) VI

Show Answer

Answer:

Correct Answer: 8. (a)

Solution:

(a) Power dissipated $= E_{rms} \cdot I_{rms}$

$= (E_{r m s}) (I_{r m s}) \cos θ$

Hence, power dissipated depends upon phase difference.

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Alternating Current - Result Question 8

8. In an A.C. circuit with voltage V and current I the power dissipated is

Answer:

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8. In an A.C. circuit with voltage $V$ and current $I$ the power dissipated is