Two parallel wires conduct equal currents in opposite directions (as is the case

Question

Two parallel wires conduct equal currents in opposite directions (as is the case with ordinary household electric cords). At a point in the plane of the wires midway between them, (a) what is the direction of the combined magnetic field generated by the two currents? (b) Do the individual fields of the wires cancel or reinforce each other there? (c) At a point in the plane of the wires but far away to one side, do the individual fields of the wires tend to cancel or reinforce each other? Explain your answer to part c.

Explanation / Answer

a)

using right hand curl rule , the direction of magnetic field at the midpoint comes out to be in the same direction.

b)

since the magnetic field by two wires are in the same direction , hence magnetic fields add together

c)

at a point , not between the two wires , the direction of magnetic field will be in opposite direction . hence the magnetic field will get subtracted

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