Question

Name two devices used for permanent magnets.

Answer 1

Answer:

Permanent magnets are used in the following major groups: acoustic transducers, motors and generators, magneto mechanical devices, and magnetic field and imaging systems. You will find permanent magnets in many products, such as televisions, telephones, computers, audio systems and automobiles

Answer 2

Answer:

1. Microphones.

2. Electric generators.

Explanation:

Permanent magnet is the magnet which produces magnetic field for longer period of time.  

Microphones use magnetic field where the coil attached to diaphragm is placed. When the sound waves are produced, the diaphragm vibration moves the coil which oscillates the magnetic field which in turn produces the audio.

The generator uses permanent magnet which have winding where the electric current is produced on rotating the magnet.

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