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AP EAMCET202318 May 2023Evening ShiftPhysicsElectromagnetic InductionActual

The self-inductance of a long solenoid of cross-sectional area A , length l and n turns'per unit length is given by

Options

  1. A₀ n Al
  2. B₀ n^2 Al
  3. C₀ n^2 ~A ^2 l
  4. D₀ n^2 A ^2 l

Correct answer

B. ₀ n^2 Al

Step-by-step solution

Magnetic flux, _ B = B . A for solenoid, B = ₀ n I _ B = ₀ nIA The total magnetic flux associates with the solenoid aligned & _ B = ₀ nIA N & N = nL & = n ^2 IAL aligned

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