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In a typical experiment to study the force between electric currents in identical fixed and movable wires, the centres of the wires were separated 0.687 cm and the length of the movable wire was 26.5cm. The apparatus was set up so as to produce an attractive force when a current of 9.3A passes through the wires in the same directions. Assume the magnetic permeability of free space Uo = 4 Pi x 10^-7 T.m/A. What mass in Mg would have to be removed from the weight pan on the movable wire to yield the attractive force when the given crrent passes through the fixed wire.

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