Name: Electric Circuit and Its Types
Uploaded: 2019-07-19
Duration: 9 min 36 s
Description: In this video, we will learn the meaning of electric circuits and will understand the difference between series and parallel circuits. Watch till the end!

Question

Give two advantages of electromagnets over a permanent magnet. What type of magnet is used in an electric bell?

Accepted Answer

The main advantages of an electromagnet over a permanent magnet are:

The magnetic field can be quickly reversed by reversing the direction of current flow.

The strength of the electromagnet can be controlled by varying the amount of electric current.

It produces a stronger field compared to a permanent magnet.

An electric bell works with the principle of working of electromagnetism. Electromagnet is a temporary magnet. An electric bell has an electromagnet that pulls a strip of iron which makes the hammer hit the gong to ring the bell.

Give two advantages of electromagnets over a permanent magnet. What type of magnet is used in an electric bell?

Important Questions on Electric Current and Its Effects

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