Q27: Figure P31.26 shows a top view of a bar that can slide on two frictionless rails. The resistor is R = V, and a -T magnetic field is directed perpendicularly downward, into the paper. Let , l = m.
(a) Calcu- late the applied force required to move the bar to the right at a constant speed of m/s.
(b) At what rate is energy delivered to the resistor?
pi =
g =