Question

The figure shows a rod of length L caused to move atconstantspeed v along horizontal conducting rails. In this casethemagnetic field in which the rod moves is not uniform butisprovided by a current i in a long wire parallel to therails.Assume that v = 7.50 m/s, a = 10.00 mm, L =12cm and i = 100 A. The rod has a resistanceof0.450 Ω and the rails and connectors havenegligibleresistance.

1. What emf is generated?
(in V)

2. What is the current in the rod?
(in A)

3. At what rate is energy being tranferred to thermalenergy inthe rod?
(in W)

4. What force must be applied to the rod by an externalagentto maintain its motion?
(in N)

5. At what rate does this external agent do work on therod?Compare this answer to the one in the third part oftheproblem.
(in W)