What is difference permanent magnet and electromagnet . give one example of each
Answers
a permanent magnet is a magnet whose magnetism will be there forever.
example : bar magnet,horseshoe magnet etc.
an electro magnet is an iron nail which is coiled by a copper through electricity is passed which makes it a magnet. if the electricity stops going the magnetism goes.
example : the electric bell in schools are made of electro magnet.
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.
Example :
- permanent magnet - magnetic compass
- electromagnet - doorbell