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NEET2024PhysicsMagnetic Properties of MatterActual

The magnetic moment of an iron bar is M . It is now bent in such a way that it forms an arc section of a circle subtending an angle of 60^ at the centre. The magnetic moment of this arc section is

Options

  1. A3 M
  2. B4 M
  3. CM
  4. D2 M

Correct answer

A. 3 M

Step-by-step solution

M=m L R =L R 3 =LR= 3 L M^ =m(2 R) 30^ =m(2) 3 L 1 2 = 3 mL= 3 M

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