The principle of operation that transformers depend upon is the induction of current in the secondary windings due to
A) motion of the primary winding relative to the secondary.
B) a varying magnetic field.
C) interaction of the core with the windings.
D) a varying electric field.

Question

Quizplus · Accepted Answer

Transformers work based on the principle of electromagnetic induction, where a varying magnetic field in the primary winding induces a current in the secondary winding. This current is proportional to the number of turns in the windings, and can be stepped up or down in voltage depending on the ratio of turns between the primary and secondary winding. The motion or interaction of the windings or core does not play a significant role in the operation of the transformer. A varying electric field would be more applicable to capacitors rather than transformers.

The Principle of Operation That Transformers Depend Upon Is the Induction