Three identical bar magnets each of magnetic moment M are arranged...

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

AZero
B2M
C $\sqrt{2}$ M
D $M\sqrt{3}$

Correct answer

B. 2M

Step-by-step solution

Magnetic dipole moment is a vector quantity.

{M}_{res} = \sqrt{{\left(\sqrt{3}M\right)}^{2} + M^{2}}

{M}_{res} = 2M

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