[单选题]
A conducting rod of lel.vav.x1psho ;:x6c pn2j0cs* 6qvvzt5cp3 xdgth $L$ is moved in a region of uniform magnetic field $B$ to light the filament bulb with a resistance of $R$. The direction of the magnetic field is out of plane.
What is the maximum output power of the bulb?
A. $\frac{BvL}{R}$
B. $\frac{B^2v^2L^2}{R}$
C. $\frac{B^2v^2L^2}{R^2}$
D. 0
