Question

An alternating emf is applied across a parallel combination of a resistance $R$, capacitance $C$ and an inductance $L$. If $I_R,I_L,I_C$ 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 $E$, is given by

• A.
• B.
• C.
• D.

Answer 1

Answer: (C)

$I_L$ lags behind $I_R$ by a phase of $\pi /2$ while $I_C$ leads by a phase of $\pi /2$.