A solenoid has a field of 1.5 T when the current is flowing in it. Its cross-sectional area is 0.30m^2. Another solenoid with 150 turns and a resistance of 20 ohms is wound tightly around the original solenoid so that both solenoids have the same cross-sectional area. The current in the first solenoid is reduced to zero uniformly over 0.5s. What current flows in the second solenoid during this time? Can some one help me with this question I am completely lost!