2. A long solenoid has 220 turns/cm and carries a current I = 1.5 A; its diameter D is 3.2 cm. At its center, we placed a 130-turn closely packed coil C of diameter d = 2.1 cm. The current in the solenoid is reduced to zero in a steady rate in 0.025 s. What is the magnitude of emf that is induced in coil C while the current in the solenoid is changing?