question_answer

Two very long straight parallel wires carry steady currents \[I\] and \[-I\]respectively. The distance between wires is d. At a certain instant of time, a point charge q is at a point equidistant from two wires in the plane of the wires. Its instantaneous velocity \[\overrightarrow{v}\] is perpendicular to this plane. The magnitude of the force due to the magnetic field acting on the charge at this instant is:                              

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

B)  \[\frac{{{\mu }_{0}}Iqv}{\pi d}\]

C)  \[\frac{2{{\mu }_{0}}Iqv}{\pi d}\]                    

D)  zero