1) In a closed circuit (that consists of a electric heater, a metal conducting rod, and two rails), it must have an outside force applied to keep the rod moving at a constant speed. The heater has 6 ? of resistance (R) and will use 15 W of power (P) in the process. The metal conducting rod has a length (L) of 1.2 m and is still moving at a constant speed (to the right) through at the magnetic field. The magnetic field has a strength of 2.4 T.
a) What is the velocity of the moving conducting rod?
b) In order to keep the rod moving to the right (at a constant speed to overcome), what force (F) must be applied to the rod?