Electro Magnetic Induction And Alternating Currents Question 18
Question: The average power dissipation in a pure capacitance in ac circuit is [DPMT 1987; MP PMT/PET 1998]
Options:
A) $ \frac{1}{2}CV^{2} $
B) $ CV^{2} $
C) $ \frac{1}{4}CV^{2} $
D) Zero
Show Answer
Answer:
Correct Answer: D
Solution:
Average power in ac circuits is given by $ P=V_{rms}i_{rms}\cos \varphi $ For pure capacitive circuit $ \varphi =90^{o} $ so P = 0
