Question

Electromagnetic technology becomes more advanced to fill ever more complex roles. Which of these is an application of electromagnets?

A.car brake systems

B.refrigerator coils

C.speaker and microphone
technology

D.all of these

Answer 1

Speakers and microphones work much the same way in using electromagnets, but they are reversed. Speakers take an electrical impulse that started out as sound and convert it back to sound, and microphones take sound waves and convert them to an electrical impulse.

Answer 2

the answer is D. All of these