Question

1. name what are four devices that use electromagnetism?

Explanation:

Electromagnetism is the interaction of electric currents or fields and magnetic fields. Many devices rely on this principle. Motors convert electrical energy into mechanical energy using electromagnetic induction. Generators do the opposite, converting mechanical energy to electrical energy via electromagnetic induction. Transformers use electromagnetic induction to change the voltage level of alternating current. Relays use an electromagnet to switch electrical circuits on or off.

Answer:

Motors, generators, transformers, relays.