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cleverfield
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Homework Statement
Let two long parallel wires, a distance d apart, carry equal currents I in the same direction. One wire is a x=0 and the other is a x=d. Determine B along the x-axis between the wires as a function of X.
Repeat problem if wire at x=0 is 2I and in the opposed direction.
Homework Equations
Answer key = u/2pi * I [(d-2x)/(x(d-x))]
The Attempt at a Solution
I understand the physics, but I am unsure how to arrive at that final answer. I do not understand determining the point along the x-axis with those variables. Can someone please help me with the deriving?