Two long parallel wires carry equal current I flowing in the same direction are at a distance 2d apart. The magnetic field B at a point lying on the perpendicular line joining the wires and at a distance x from the midpoint is

Options

A. `(mu_(0)id)/(pi (d^(2)+x^(2)))`
B. `(mu_(0)ix)/(pi (d^(2)-x^(2)))`
C. `(mu_(0)ix)/((d^(2)+x^(2)))`
D. `(mu_(0)id)/((d^(2)+x^(2)))`

Answer

B