Two short magnets of the same type, but of moments m and 2m are mounted on a frame so as to form a cross. If the combination is suspended at the centre with a vertical fibre, find the direction in which it will set in the earth's magnetic field. Calculate also the magnetic B-field at a distance d from the centre of the cross on the prolongation of one of the arms.

Two short magnets of the same type, but of moments m and 2m are mounte

1.	Two short magnets of the same type, but of moments m and 2m are mounted on a frame so as to form a cross. If the combination is suspended at the centre with a vertical fibre, find the direction in which it will set in the earth's magnetic field. Calculate also the magnetic B-field at a distance d from the centre of the cross on the prolongation of one of the arms.
Answer» Answer :`26^(@)36' (mu_(0))/(4PI) (2sqrt(2)m)/(d^(3)),(mu_(0))/(4pi) 6(msqrt(17))/(d^(3))`

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