Question
A long straight conductor PQ, carrying a current of 75 A , is fixed horizontally. Another long conductor XY is parallel to PQ at a distance of 5mm,in air. Conductor XY is free to move and carries a current I. Calculate the magnitude and direction of’ ‘I’ for which the magnetic repulsion just balances the weight of conductor XY ( mass per unit length for conductor XY is 10-2 kg/m).
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