A wire of length `1 m` is moving at a speed of `2 ms^(-1)` perpendicular to its length and a homogeneous magnetic field of `0.5T`. The ends of the wire are joined to a circuit of resistance `6 Omega`. The rate at which work is being done to keep the wire moving at constant speed is
A. `(1)/(12)W`
B. `(1)/(6)W`
C. `(1)/(3)W`
D. `1W`