A conducting rod of length moves on two horizontal, frictionless rails, as shown in Figure P31.20. If

Question:

A conducting rod of length ℓ moves on two horizontal, frictionless rails, as shown in Figure P31.20. If a constant force of 1.00 N moves the bar at 2.00 m/s through a magnetic field B that is directed into the page,
(a) What is the current through the 8.00-Ω resistor R?
(b) What is the rate at which energy is delivered to the resistor?
(c) What is the mechanical power delivered by the force Fapp?

A conducting rod of length ℓ moves