Question

I. What is a solenoid? Compare the
magnetic field produced by a solenoid
with the magnetic field of a bar
magnet. Draw neat figures and name
various components.​

Answer 1

Solenoid

A solenoid is a rectangular arrangements of copper coils rounded around a metal or none.

The magnetic field pattern of a solenoid is same as of the bar magnet. However, the magnetic field inside the solenoid at any point is uniform.

In solenoid, Magnetic field strength depends upon:

• Nature or material of metal around which the copper coils are coiled.
• Magnitude of current.

What differentiate between a solenoid and a bar magnet are,

• Direction of magnetic field lines of the solenoid can be changed by changing the direction of current while the direction of magnetic field lines in case of a bar magnet is fixed.
• Solenoid is like a temporary magnet, Loses magnetic field strength over time. and in some time, It becomes non-magnetic, while a bar magnet is a permanent which doesn't lose its strength over time.

Please refer to the attachment for the diagrams.