A conductive bar (green) rests on two

conductive rails (blue) and is driven with

a current source with current I. A

magnetic flux of B = Boâz is applied

evenly to the region.

a. Write an expression for di. (Assume that the conductive bar is a thin wire, not

a cylinder.)

b. Write an expression for the differential force on a small piece of the conductive

bar.

c. Write an expression for the total force on the whole conductive bar.