APFIVE Motional EMF and Terminal Velocity
A conducting rod of mass m slides down frictionless conducting rails that form a 30° angle with the horizontal. The rails are separated by a distance L and are connected at the bottom by a resistor of resistance R. A uniform magnetic field B points perpendicular to the plane of the rails (into the page). What is the terminal velocity the rod will reach as it slides down?
A
$$\frac{mgR}{B^2L^2 \sin(30^\circ)}$$
B
$$\frac{mgR\sin(30^\circ)}{B^2L^2}$$
C
$$\frac{mgR}{BL\sin(30^\circ)}$$
D
$$\frac{mg\sin(30^\circ)}{BL}$$
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