Two straight horizontal parallel wires are carrying the same current in the same direction, `d` is the distance between the wires, You are provided with a small frelly suspended magnetic needle. At which of the following positions will the orientions of the needle be independent of the magntitude of the current in the wires?

Options

A. At a distance `d//2` from any of the wires
B. At a distance `d//2` from any of the wires in the horizontal plane
C. Anywhere on the circumference of a verticle circle of raadius `d` and centre halfway between thw wires
D. At points halfway between the wires in the horizontal plane

Answer

D

Explanation

At these points, the resulat field = 0