The current in an inductor connected to an AC voltage source lags the voltage.This lag is caused by the:
A)back emf in the coil.
B)voltage across the coil.
C)time required for electrical signals to travel through all the coils of an inductance.
D)resistance of the coil.

Question

Quizplus · Accepted Answer

The lag or phase shift between the voltage and current in an inductor is caused by the production of a back electromotive force (EMF) in the coil as the current flows through it. This back EMF opposes the applied voltage and causes the current to lag behind the voltage. The larger the inductance, the greater the lag or phase shift. Therefore, choice A, back EMF in the coil, is the best answer.

The Current in an Inductor Connected to an AC Voltage