A transformer is a device that normally
A) operates only on ac.
B) operates on either dc or ac.
C) operates only on dc.

Question

Quizplus · Accepted Answer

Transformers work on the principle of electromagnetic induction, which requires a changing magnetic field. Only alternating current (AC) provides this changing field, making transformers suitable for AC operations only. Direct current (DC) does not change direction or magnitude, thus it cannot induce the necessary changing magnetic field in the transformer's core.

A Transformer Is a Device That Normally