Answer Happy

The figure below shows a zero-resistance rod sliding to the
right on two zero-resistance rails, which are separated by a
distance d = 0.782 m. The rails are connected in series with
a R = 1.22 Ω resistor. The plane of the circuit is embedded
in a uniform B = 0.067 T magnetic field, which points out of the
page. A steady external applied force, F, which points to the
right, acts on the rod.
(a) How fast must the rod move to the right in order for a
I = 0.90 A current to be induced in the circuit? What is the
direction of the induced current?
(b) How much applied force, F, must act on the rod in order to
induce a steady I = 0.90 A current? Assume the rod moves with
constant velocity found in part (a).
(c) If a friction force of 0.100 N acts to the left on the
sliding rod, what must the applied force, F, be in order for a I =
0.75 A current to be induced? Assume the rod moves with a constant
velocity found in part (a).
R 7033 F