Question

Electromagnetic induction is the production of a voltage across a conductor when it is exposed to a varying magnetic field. This process is essential in which of these devices? A) A diode. B) A capacitor. C) A transformer D) A potentiometer.

Answer 1

Answer: C. a transformer.

For USATestprep.

Answer 2

A transformer.

Step-by-step explanation:

A transformer is a device that involves magnetically coupled coils isolated from one to another but wound on the same magnetic core. A variable current in time in a coil establishes in the magnetic core a flux also variable in time, this flow is linked to the other coil and induces in it an electromotive force (voltage) variable in time.