In Fig. 20.2, a metal rod of length L moves to the right at speed v. (a)

Question:

In Fig. 20.2, a metal rod of length L moves to the right at speed v.
(a) What is the current in the rod, in terms of v, B, L, and R?
(b) In what direction does the current flow?
(c) What is the direction of the magnetic force on the rod?
(d) What is the magnitude of the magnetic force on the rod (in terms of v, B, L, and R)?