A pure inductor is connected to an ac power supply. In this circuit, the current
A) leads the voltage by $90 ^ { \circ }$.
B) lags the voltage by $90 ^ { \circ }$.
C) is in phase with the voltage.
D) lags the voltage by $45 ^ { \circ }$.
E) leads the voltage by $45 ^ { \circ }$.

Question

A pure inductor is connected to an ac power supply. In this circuit, the current 
A) leads the voltage by $90 ^ { \circ }$.
B) lags the voltage by $90 ^ { \circ }$.
C) is in phase with the voltage.
D) lags the voltage by $45 ^ { \circ }$.
E) leads the voltage by $45 ^ { \circ }$.

Quizplus · Accepted Answer

In a pure inductive circuit, the current lags the voltage by $90^\circ$ due to the inductor's property of opposing changes in current.

A Pure Inductor Is Connected to an Ac Power Supply 90∘90 ^ { \circ }90∘

A Pure Inductor Is Connected to an Ac Power Supply $90 ^ { \circ }$