Difference between electromagnet and permanent magnet 0
Answers
Permanent (Bar) Magnet :-
*They are permanently magnetized
*These are usually made of hard materials.
*The strength of the magnetic field line is constant i.e. it cannot be varied.
*The poles of a Permanent magnet cannot be changed.
*Example of a permanent magnet is a Bar Magnet
Electromagnet :-
*These are temporarily magnetized.
* They are usually made of soft materials.
*The strength of the magnetic field lines can be varied according to our need.
*The poles of an electromagnet can be altered.
*Example of a temporary magnet is solenoid wounded across a nail
and connected to a battery
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The differences between permanent magnet and electromagnet are as follows :-
⇒ The permanent magnet does not have electric current flow through it.
⇒ Electromagnets are made by passing electric current through it.
⇒ The strength of the magnetic field in permanent magnets cannot be changed.
⇒ The strength of the electromagnets can be changed by changing the amount of current in the magnet.
⇒ The direction of the magnetic field cannot be changed.
⇒ The direction of magnetic field can be changed in electromagnets.
⇒ The polarity of permanent magnets cannot be changed.
⇒ The polarity of the electromagnets can be changed.
⇒ The permanent magnet is generally made of hard iron.
⇒ The electromagnets are generally made of soft iron.