First slide

AC Circuits

Question

In a pure inductive circuit or In an ac circuit containing inductance only, the current

Easy

A

Leads the e.m.f. by 90^o
B

Lags behind the e.m.f. by 90^o
C

Sometimes leads and sometime lags behind the e.m.f.
D

Is in phase with the e.m.f.

Solution

In purely inductive circuit , current lags behind voltage by $\frac{π}{2}$

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