question_answer

An arrangement of three parallel straight wires placed perpendicular to plane of paper carrying same current T along the same direction is shown in fig. Magnitude of force per unit a length on the middle wire 'B' is given by

A) \[\frac{2{{\mu }_{0}}{{i}^{2}}}{\pi d}\]

B) \[\frac{\sqrt{2}{{\mu }_{0}}{{i}^{2}}}{\pi d}\]

C) \[\frac{{{\mu }_{0}}{{i}^{2}}}{\sqrt{2}\pi d}\]

D) \[\frac{{{\mu }_{0}}{{i}^{2}}}{2\pi d}\]