Question

Same current / is flowing in three infinitely long wire along positive x, y and z-directions. The magnetic field
at a point (0, 0, -a) would be​

Answer 1

Answer:

μI/πa

Explanation:

there will be no force due to wire placed along Z axis, however there will be same contribution by the wire along y and x axis;

using the formula B=μI/2πa where a is the distance of the point from the wire

∴ total contribution due to two wires= 2(μI/2πa)=μI/πa

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