A long solenoid with n=15turns/cm (turns per centimeter) has a crosssectional area of 6.2 cm² and carries a current of 0.45 A. A circular coil with ten turns (N=10) and area of 12 cm² encircles the solenoid. When the current through the solenoid is turned off, it decreases to zero in 25 ms. What is the average emf induced in the coil? (1ms=1×10⁻³s)
