Question

5. What is an electromagnet? How is it
different from a permanent magnet? Why is
iron used as the core of an electromagnet?​

Answer 1

Answer:

The current inside solenoid can be used to magnetize a material like soft iron when placed inside.The magnet so formed is called an electro magnet.

Differences :

An electro magnet's poles can be varied while permenant magnets have fixed poles

The current can be changed in an electromagnet but the current produced by a permenamt magnet can never be changed

Iron is soft and can be easily magnetised.So its used in the making of an electromagnet.