Question

what is a solenoid ??? what is its work??

Answer 1

a solenoid is a coil of insulated wire wound on a rod shaped form made up of solid iron,solid steel,powered iron
used as electromagnets as inductors in electronic circuits .....

Answer 2

Solenoid. A long straight coil of wire can be used to generate a nearly uniform magnetic field similar to that of a bar magnet. Such coils, called solenoids, have an enormous number of practical applications. The field can be greatly strengthened by the addition of an iron core. Such cores are typical in electromagnets ...