Question

What are electro magnets and how are they useful?
Please list any two situations where electro magnets are useful.

Answer 1

1. An electromagnet is a magnet that is created using electric current. It can even be weakened and strengthened by decreasing and increasing the current .
Uses--
1. they are used inall kinds of electric devices including hard disk drives , speakers , motors and generators.
2. they are also used in scrap yards to pick up heavy scrap metal.

Answer 2

Answer:

Electromagnets are widely used as components of other electrical devices, such as motors, generators, electromechanical solenoids, relays, loudspeakers, hard disks, MRI machines, scientific instruments, and magnetic separation equipment.

Explanation:

1.) Sound

If you have ever used a loudspeaker, you have heard an electromagnet in use. If you have an MP3 player or another portable audio device and use earphones to listen to music, you have used an electromagnet. An electromagnet draws the speaker diaphragm, allowing the music to be played.

2.) Televisions

Traditional television sets use an electromagnet to power the cathode ray tube. The electromagnet directs the beaming of electrons, which in essence illuminates the television.