Question

what is an electromagnet?state in one practical use​

Answer 1

$\large{\bold{\underline{\underline{ Electromagnets :-}}}}$

$\implies$ An electromagnet is a magnet consisting of a long wire of insulated copper wrapped around a soft iron core that is magnetised only when electric current passes through the coil .

$\implies$ An electromagnet can produce very strong magnetic force .

$\implies$ The strength of an electromagnet can be changed by turning number of coils or by changing current flowing through it.

$\large{\bold{\underline{\underline{Uses:-}}}}$

$\implies$ used in eye surgery .

$\implies$ used in running Magnetic levitation trains.

$\implies$ used in making electromagnetic microscope.