7.17   A long solenoid of radius a, carring n turns per unit length, is looped by a wire with resistance R, as shown in Fig 7.27

1. If the current in the solenoid is increasing at a constant rate (dI/dt = k), what what current flows in the loop, and which way (left of right) does it pass through the resistor?

2. If the current I in the solenoid is constant but the solenoid is pulled out of the loop, turned around, and reinserted, what total charge passes through the tesistor?
   
   Figure 7.27