Problem C2:
In the figure above, there are two infinitely long thin wires. Each wire
carries the same current I0 downward. The wires are separated
by a distance n1d. What is the magnetic field at a location
which is a distance n2d to the right of wire on the right?
That is, if the magnetic field at this location equals
μ0 I0/(n3 π d) k,
where k points out of the page. What is n3?
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