question_answer

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:            [JEE Main 9-4-2019 Morning]

A) \[1/{{L}^{2}}\]

B) \[1/L\]

C) \[L\]

D) \[{{L}^{2}}\]

Correct Answer: B

Solution :

[b]

constant

self inductance

Option [b]