Q)
A 100 turn rectangular coil ABCD is hung from one arm of a balance(as shown in the figure) . A mass 500 g is added to the other arm to balance the weight of the coil . A current 4.9A passes through the coil and a constant magnetic field of 0.2T acting inward (in xz plane) is switched on such that only arm CDof length 1 cm lies in the field . Hoe much additional mass 'm' must be added to regain the balance ?
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