A rectangular loop of wire of sides W = 0.3 m and L = 0.7 m lying in xy plane carries a current of I = 42.5 A. If a uniform magnetic field of B = (2.7 T)î + (0.7 T)k is turned on, then what will be the initial magnitude of torque acting on the loop in units of in units of N•m? Answer: W
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