when 4 bar magnets of moments M,2M,3M,4M are arranged to form a square with unlike poles at each corner then resul†an t magnetic moment is

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Q. Four magnets of equal length but magnetic moments

M, 2 M, 3 M

and

4 M

respectively are arranged in the form of a square such that their unlike poles are in contact. Then the resultant magnetic moment of the system is-

Q. Select the correct answer about magnets with Magnetic Moment

M

:
a) When

n

identical magnets are arranged in the form of closed polygon with unlike poles nearer, the resultant magnetic moment is zero.
b) If one magnet is removed from the arrangement, resultant magnetic moment becomes

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c) If one magnet is reversed in the polygon, the resultant magnetic moment of combination becomes

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The magnetic moment of a bar magnet is 0.256 $A m^{2}$ . Its pole strength is 400 $m A$ . It is cut into two equal pieces and these two pieces are arranged at right angles to each other with their unlike poles in contact (or like poles in contact). The resultant magnetic moment of the system is:

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