Question

Average power in the $LCR$ circuit depends upon

• A. current
• B. phase difference only
• C. EMF
• D. current, EMF and phase difference

Answer 1

Answer: (D)

The average power of $LCR$ circuit is given as,
$P_{av}=V_{rms}\cdot i_{rms}\cdot cos\varphi$
Hence, the average power depends upon current, EMF and phase difference.