Question

An alternating emf is applied across a parallel combination of a resistance R, capacitance C and an inductance L. If $I_R,I_L$ and $I_C$ are the currents through R, L and C respectively, then the diagram which correctly represents the phase relationship among $I_R,I_L,I_C$ and source emf $\epsilon$, is given by

• A.
• B.
• C.
• D.

Answer 1

Answer: (C)

Current in inductance $I_L$ lags behind the emf in phase by $\pi /2$, current in resistance IR is in phase with emf, while current in capacitance $I_C$ leads by a phase of $\pi /2$.