Question

The axial magnetic fields due to infinite solenoid

Answer 1

Answer:

The magnetic field generated in the center, or core, of a current-carrying solenoid, is essentially uniform and is directed along the axis of the solenoid. Outside the solenoid, the magnetic field is far weaker. The solenoid is wound from a single helical wire which carries a current.

Explanation:

A solenoid is a long coil of wire wrapped in many turns. When a current passes through it, it creates a nearly uniform magnetic field inside. Solenoids can convert electric current to mechanical action, and so are very commonly used as switches.