Draw a diagram of the magnetic lines of force to show that a current carrying solenoid is equivalent to a bar magnet.

Magnetic lines of force inside a current carrying solenoid are

Magnetic lines of force inside a current carrying solenoid are

The magnetic field due to a current-carrying solenoid is independent of

Compare the magnetic lines of force around a bar magnet and a solenoid.

The magnetic field lines in the middle of the current-carrying solenoid are :

Do you know solenoid? Can you compare the magnetic field due to a current carrying solenoid with that due to a bar magnet?