Question

Average power in the $L-C-R$ circuit depends upon

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

Answer 1

Answer: (D)

current, emf and phase difference

Answer 2

The average power of $L-C - R$ circuit
$P_{ av } ^ ? =V_{ rms } \cdot i_{ rms } \cos \phi$
Hence, the average power depends upon current, emf and phase difference.