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MHT CET2016PhysicsMagnetic Properties of Matter

The magnetic field ( B ) inside a long solenoid having n turns per unit length and carrying current I when iron core is kept in it is ( μ 0 = permeability of vacuum, χ = magnetic susceptibility)

Options

  1. Aμ 0 n I ( 1 - χ )
  2. Bμ 0 n I χ
  3. Cμ 0 n I 2 ( 1 + χ )
  4. Dμ 0 n I ( 1 + χ )

Correct answer

D. μ 0 n I ( 1 + χ )

Step-by-step solution

B = μ 0 n I ( 1 + χ )

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