Question

In a pure inductive AC circuit

• A. current leads the voltage by $\frac{ \pi}{ 2}$
• B. current lags behind the voltage by $\frac{ \pi}{ 2}$
• C. voltage lags behind the current by $\pi$
• D. current and voltage are in same phase

Answer 1

Answer: (B)

current lags behind the voltage by $\frac{ \pi}{ 2}$

Answer 2

In a pure inductive AC circuit,
$E = E_0 \sin \, \omega t$
$i = I_0 \sin \, \bigg( \omega t - \frac{ \pi}{ 2} \bigg)$
we get $\phi = \frac{ \pi}{ 2}$