Question

A give two advantage of electromagnet over permanent magnet what type of magnet is used in electric bell ?
B draw a labelled diagram of an electric Bell

​

Answer 1

Answer:

The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.

Explanation: