Answer :

given,


Number of oscillations per second made by the combination of bar magnets with like poles, f1 = 10s-1


Number of oscillations per second made by the combination of bar magnets with unlike poles, f2 = 2s-1


The frequency of oscillations in the magnetometer (ν)ν is given by



------------------------(1)


(1) When like poles are tied together, the effective magnetic moment is M= M1 - M2


(2) When unlike poles are tied together, the effective magnetic moment is M= M1 + M2


As the frequency of oscillations is directly proportional to the magnetic moment,









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