Verified Solution • 2025–26 Session moderate

QJEEM19Ph2334: JEE Main 2019 Physics - Class 12 JEEM19Ph2334 Solution: The total number of turns and cross-section area in a solenoid…

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 :

Multiple Choice Options

  • A 1/L2
  • B 1/L
  • C L
  • D L2

Step-by-Step Verified Solution

ϕ = NBA = LI

N μ0 nIπR2 = LI

Nμ0NllπR2=LI

N and R constant

Self inductance (L) ∝1l∝1length

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