The total number of turns and cross-section area in a solenoid is fixed. However, its length L is varied by…

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:
  1. L
  2. 1L2
  3. 1L
  4. L2

Solution

Self-Inductance =μ0n2πr2L (n = number of turns per unit length)
=μ0NL2πr2L
=μ0N2πr2L
Self-Inductance ∝1L

Asked in: JEE Main 2019 (09 Apr Shift 1)

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