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MHT CET202016 Oct 2020Morning ShiftPhysicsMagnetic Effects of CurrentActual

Two identical bar magnets each of magnetic moment 'M', separated by some distance are kept perpendicular to each other. The magnetic induction at a point at the same distance 'd' from the centre of magnets, is ( ₀= . permeability of free space )

Options

  1. A₀ 4 ( 2 ) M d ³
  2. B₀ 4 ( 3 ) M d³
  3. C( 2 ₀ ) M d ³
  4. D₀ 4 ( 5 ) M d ³

Correct answer

D. ₀ 4 ( 5 ) M d ³

Step-by-step solution

B ₁= 2 M ₀ 4 d ³ at axial position B ₂= M ₀ 4 d ³ at equatorial position B _ Net = B ₁²+ B ₂² = M ₀ 4 d ³ 5

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