Question 231: Magnetism and Matter

Question

Two long parallel wires are at a distance $$2d$$ apart. They carry steady equal currents flowing out of the plane of the paper as shown. The variation of the magnetic field $$B$$ along the line $$XX'$$ is given by

Accepted Answer

The magnetic field varies inversely with the distance for a long conductor. That is, $$B \propto {1 \over d}.$$ According to the magnitude and direction shown graph $$(1)$$ is the correct one.

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Magnetism and Matter

Two long parallel wires are at a distance $2d apart. They carry steady equal currents flowing out of the plane of the paper as shown. The variation of the magnetic field B along the line XX'$ is given by

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