which magnet will you choose among permanent magnet and electromagnet for industrial purpose ?justify your answer
Answers
Electric magnets have high electric field.
These have aligned parts. These can be modified in any desired shape.
the magnetic field of these can be controlled at any time. The magnets can get high magnetic fields varying from -ve to 0 and positive.
it is not easy to handle natural magnets and can't be used easily by cranes for lifting purpose as they will not drop.
Electromagnets don't loose their strength when heated .
Permanent magnets are not usable after time.
So electromagnets are preferred.
Here is your answer :
⇒ 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.
Thus electromagnet is better !