A 20-cm-long, zero-resistance slide wire moves outward, on zero-resistance rails, at a steady speed of 10 m/s

Question:

A 20-cm-long, zero-resistance slide wire moves outward, on zero-resistance rails, at a steady speed of 10 m/s in a 0.10 T magnetic field. (See Figure 30.26.) On the opposite side, a 1.0 Î© carbon resistor completes the circuit by connecting the two rails.
The mass of the resistor is 50 mg.

Figure 30.26

Magnetic flux Pm = AB = xlB I| X, хх B Induced current a. What is the induced current in the circuit?
b. How much force is needed to pull the wire at this speed?
c. If the wire is pulled for 10 s, what is the temperature increase of the carbon? The specific heat of carbon is 710 J/kg K.