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MHT CET Physics question

PhysicsMoving Charges and MagnetismMHT CET

Two infinitely long, thin, insulated, straight wires lie in the XY-plane along the X and Y-axes, respectively. Each wire carries a current i respectively, in the positive x-direction and positive y-direction. The magnetic field will be zero at all points on the straight line with equation

Answer: (A)

Solution

At (x, y) the x-wire gives and the y-wire gives ; they cancel when

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Question ID VK-078776