a) Please note the missing ln in the answer section of HRW.
vt = mgR / B2L2
extension: 16.5 mm/s.
a) Taking the time derivative of the expression below leads to an induced emf of 0.24 mV for the parameters stated in problem description.
b) The induced current is 0.60 mA clockwise.
c) Thermal power generated is 0.144 microW.
d) The external agent must apply a force of 28.7 nanoN.
e) Same power as part c).