The number of turns, cross-sectional area and length for four solenoids are given in the following table.

The solenoid with maximum 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:

When the number of turns and length of a solenoid are doubled keeping the area of cross-section same, the inductance.

When the number of turns and the length of the solenoid are doubled keeping the area of cross-section same, the inductance