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Three identical bar magnets each of magnetic moment M are arranged in the form of an equilateral triangle such that at two vertices like poles are in contact. The resultant magnetic moment will be

Options

  1. AZero
  2. B2M
  3. C2 M
  4. DM 3

Correct answer

B. 2M

Step-by-step solution

Magnetic dipole moment is a vector quantity. M r e s = 3 M 2 + M 2 M r e s = 2 M

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