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Two identical short bar magnets each having magnetic moment M are placed at a distance of 2 d with their axes perpendicular to each other in a horizontal plane. The magnetic induction at a point midway between them is

Options

  1. A2 μ 0 M 4 π d 3
  2. B3 μ 0 M 4 π d 3
  3. Cμ 0 M 2 π d 3
  4. D5 μ 0 M 4 π d 3

Correct answer

D. 5 μ 0 M 4 π d 3

Step-by-step solution

At magnetic field is a vector quantity. at point p two magnetic field are acting at 90 o   B n e t = B 1 2 + B 2 2 = 2 μ 0 M 4 πd 3 2 + μ 0 M 4 πd 3 2 = μ 0 M 4 πd 3   5

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