Question

Which metal is commonly used for making an electromagnet?
a) Copper
b) Iron
c) Nickel
d) Cobalt

Answer 1

answer : option (b) Iron

explanation : electromagnet is a type of magnet in which magnetic field is produced by passing electric current through it. if electric current is turned off, magnetic field disappears.

usually, electromagnet consists wire wound into a coil. The wire turns are often wound around a magnetic core which is made from $\textbf{ferromagnetic}$ material.

and we know, iron is a ferromagnetic material. so, it is commonly used for making an electromagnet.

Answer 2

The correct answer to your question is option (B)-Iron.

Usually, electromagnets are made from ferromagnetic metals like iron. A piece of iron can be used as a core and a roll of copper wire can be used to insulate the core. The iron core must be winded with copper wire and induced with electricity.  

When the electric current passes itself through the winding the iron core becomes itself a magnet by observing the current flow. Soft iron is used as the magnetic property of the core will be banished as soon as the flow of current stopped.  

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