Two very long, straight , parallel wires carry steady currents ` I &-I` respectively . The distance between the wires is `d`. At a certain instant of time, a point charge `q` is at a point equidistant from the wires , in the plane of the wires. Its instantaneous vel,ocity ` v` is perpendicular to this plane. The magnitude of the force due to the magnetic field acting on the charge at this instant is

Options

A. `(mu_(0) Iqv)/(2 pi v)`
B. `(mu_(0) Iqv)/(pi d)`
C. `(2 mu_(0) Iqv)/(pi d)`
D. zero

Answer

D