A conducting bar of length script l moves to the right on two frictionless rails, as shown in the figure below. A uniform magnetic field directed into the page has a magnitude of 3.10 T. Assume script l = 32 cm and R = 8.7 O.
(a) At what constant speed should the bar move to produce an 8.2 mA current in the resistor?
m/s
(b) At what rate is energy delivered to the resistor?
mJ/s
(c) Explain the origin of the energy being delivered to the resistor.