Applying an ac voltage to an electromagnet's coil will produce a .
A)south magnetic field
B)changing magnetic field
C)north magnetic field
D)steady magnet field

Question

Quizplus · Accepted Answer

An ac voltage is a voltage that changes direction periodically. When an ac voltage is applied to an electromagnet's coil, the current in the coil will also change direction periodically. This changing current will create a changing magnetic field.

Applying an Ac Voltage to an Electromagnet's Coil Will Produce