Look at Figure 27.9 of your text, replace the resistor on the left with a perfectly conducting wire, and suppose the sliding conducting bar has resistance R=4.20m Omega and is made of copper and has a cross sectional area of A=4.00 (mm)^2, a length of [=999 mm, and a number density of n= 1.1x1029 mobile electrons per m3. Suppose you slide the bar to the right at 1.00mm/s through a field of strength 1.00 mT.
a) Given that there are 2.46x10^30 protons per m3, find the magnetic force the protons feel.
b) Given that there are 2.35x10^30 nonmobile electrons per m^3, find the magnetic force they feel.
c) The total force above is all in the up/down direction, and makes the bar press against the top bar until they compress enough to get an equal and opposite force pushing the bar back. What is the net force on the body of the bar from the compression against the top bar?
d) What is the rate of change of the magnetic flux?
e) What is the motional EMF associated with the changing magnetic flux?
