A conducting rod of mass m and length l is placed over a smooth horizontal surface. A uniform magnetic field B is acting perpendicular to the rod. Charge q is suddenly passed through the rod and it acquires an initial velocity v on the surface, then q is equal to?

Options

A. `(2mv)/(Bl)`
B. `(Blv/(2mv))`
C. `(mv)/(Bl)`
D. `(Blv)/(2m)`

Answer

C