Question

2. Give reasons: (U,Ap)
a. A magnet cnnot be used instead of electromagnet.​

Answer 1

Explanation:

A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. ... An electromagnet is made from a coil of wire which acts as a magnet when an electric current passes through it.

Answer 2

Answer:

No we can not use permanent magnets in radio and electric bells , because permanent magnets loose their property after some time whereas we can change the properties of electromagnet.