A solenoid has fixed N number of turns and fixed radius `a` its length is given by `l` which can be varied its self-inductance is proportional to

A solenoid has length l, area A and number of turns N. If it is filled with material of permeability mu then its self inductance is :

The total number of turns and cross-section area in a solenoid is fixed. However, its length L is varied by adjusting the separation between windings. The inductance of solenoid will be proportional to :

The total number of turns and cross-section area in a solenoid is fixed. However, its length L is varied by adjusting the separation between windings. The inductance of solenoid will be proportional to:

A long solenoid has a radius a and number of turns per unit length is n . If it carries a current i, then the magnetic field on its axis is directly proportional to

A long solenoid has a radius a and number of turns per unit length is n . If it carries a current i, then the magnetic field on its axis is directly proportional to

The number of turns of a solenoid of length l and area of cross-section A is N. The self-inductance L increases as