[" The expression for magnetic induc- "],[" tion inside a solenoid of length "L],[" carrying a current I and having "N],[" number of turns is "]

The expression for magnetic induction inside a solenoid of length L carrying a current I and having N number of turns is

The expression for magnetic induction inside a solenoid of length L carrying a current I and having N number of turns is

The magnetic field B within a solenoid of length L with N turns and carrying a current I is given by

Using Ampere's circuital law, obtain an expression for the magnetic field along the axis of a current carrying solenoid of length l and having N number of turns.

Using Ampere's circuital law, obtain an expression for the magnetic field along the axis of a current carrying solenoid of lenth l and having N number of turns.

Derive an expression for the magnetic field due to a solenoid of length 2l , radius a, having n number of turns per unit length and carrying a steady current I, at a point on the axial line, distant r from the centre of the solenoid. How does this expression compare with the axial magnetic field due to a bar magnet of magnetic moment M?