Two loops of wire, each having a different radius, encircle an infinitely long solenoid, as shown in (Figure 3) . The magnetic field B⃗ is zero outside the solenoid. The current through the solenoid is increasing with time, causing the magnetic field inside the solenoid to increase with time. Which statement is true?
a) The emf around the two wire loops is the same and is non-zero.
b) The emf around wire loops 1 and 2 is zero since there is no magnetic field outside the solenoid.
c) The emf around wire loop 2 is greater than that of loop 1.