Question

An electromagnets magnetic field can be rapidly manipulated over a wide range by controlling the amount of electric current supplied to the electromagnet.
State whether the above statement is true or not?

• A. True
• B. False

Answer 1

The correct option is A True

A current through the wire creates a magnetic field which is concentrated in the hole in the center of the coil. ... 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.