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AIIMS2015PhysicsMagnetic Effects of Current

What is the magnetic field on the axis of a coil of radius r carrying current I at a distance R from the origin?

Options

  1. A₀ I r^2 2 (r^2+R^2 )^ 3 / 2
  2. B₀ I R^2 2 (r^2+R^2 )^ 3 / 2
  3. C₀ I 2(r+R)
  4. D₀ I R 2 (r^2+R^2 )^ 1 / 2

Correct answer

A. ₀ I r^2 2 (r^2+R^2 )^ 3 / 2

Step-by-step solution

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