Question

differences between bar and permanent magnet.​

Answer 1

Difference between Permanent Magnet and Electromagnet

Permanent (Bar) Magnet Electromagnet

1. They are permanently magnetized. 1. These are temporarily magnetized.

2These are usually made of hard materials. 2They are usually made of soft materials.

3The strength of the magnetic field line is constant i.e. it cannot be varied. 3 The strength of the magnetic field lines can be varied according to our need.

4 The poles of a Permanent magnet cannot be changed. 4The poles of an electromagnet can be altered.

5 Example of a permanent magnet is a Bar Magnet 5Example of a temporary magnet is solenoid wounded across a nail and connected to a battery.

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