Question

Which is not the correct statement regarding an electromagnet?

विकल्प

• A coil of many turns of an insulated copper wire is wound over soft iron core.

• A coil of many turns of an insulated copper wire is wound over stainless steel core.

• A strong electromagnet has large number of turns of an insulated copper wire.

• The core of the electromagnet is laminated.

Answer 1

A coil of many turns of an insulated copper wire is wound over stainless steel core.

Explanation:

An electromagnet uses a soft iron core, not a stainless steel core. Soft iron gets magnetised easily and loses magnetism quickly. The other statements are correct features of an electromagnet.