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What is the magnitude of the magnetic moment of a short bar magnet that experiences a torque of 4.5 × 10⁻² J when its axis is at 30° with a uniform external magnetic field of 0.25 T?

Options

  1. A0.18 JT
  2. B0.36 JT
  3. C0.72 JT
  4. D-0.72 JT

Correct answer

B. 0.36 JT

Step-by-step solution

Correct Option is : (B) 0.36 JT

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