What is meant by Solenoid ? How does a current carrying Solenoid behave ? Give its main use.

Explanation

A coil of many clrcular turns of insulated copper wire wrapped closely in the shape of a cylinder is called a Solenoid.
The field lines around a current-carrying solenoid is similar to that produced by a bar magnet This means that a current - carrying solenoid behaves as having north pole and south pole.
The strong magnetic field produced inside a solenoid can be used to magnetise a piece of magnetic material like soft iron when placed inside the coil.