Two magnets of magnetic moments M and 31/2 M are joined to form a cross. The combination is suspended in a uniform magnetic field B. The magnetic moment M now makes an angle θ with the field direction. find the value of angle  θ.

Resultant of magnetic moments M and (3)0.5M is given by

So,  θ + β = 600

System is equilibrium so net torque will be zero.

Hence, θ + β = 600

=> θ = 600

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