Two long parallel straight wires X and Y separated by a distance 5cm in air carry currents of 10A and 5A respectively in opposite directions. Calculate the magnitude and direction of the force on a 20cm length of the wire Y.
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for long parallel wires B=u°i/2πd for y wire By is u°×5/2π ×0.05 then y par x wire ke current ke karan force lagega Fy=10×By×0.2 sin 90° and dirn is away from x due to same dirn of magnetic field repelling nature
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