The drawing shows two perpendicular, long, straight wires, both of which lie in

Question

The drawing shows two perpendicular, long, straight wires, both of which lie in the plane of the paper. The current in each of the wires is I = 6.1 A. In the drawing dH = 0.19 m and dV = 0.49 m. Find the magnitudes of the net magnetic fields at points A and B.

Explanation / Answer

The magnetic field B = µo*I/(2pr) => µo/2p = 2 x10^-7 So the magnitude for wire A and = 2x10^-7*12/0.9 = 2.67x10^-6T and the direction at B is in the-y diirection The magnitude for wire C and = 2x10^-7*14/0.9 = 3.11x10^-6T and the direction is in the +x direction so the magnitude = sqrt((2.67x10^-6)^2 + (3.11x10&-6)^2) = 4.10x10^-6T The magnitude at the other corner is the same

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