Question

give reason for the question​

Answer 1

the magnetic strength

Answer 2

Putting a piece of iron or steel inside the coil makes the magnet strong enough to attract objects. The strength of an electromagnet can be increased by increasing the number of loops of wire around the iron core and by increasing the current or voltage

.Suspend a bar magnet freely .Note the direction in which it comes to rest. It always comes to rest along the north- south direction of the earth. This is termed as the directive property of a magnet. 2] Uses of a magnet: 1] Electric motors and generators rely on magnets. 2] Magnets are often used in toys.