1. The problem statement, all variables and given/known data A coil of 15 turns and radius 10cm surrounds a long solenoid of radius 2cm and 1x10^3 turns/m. The current in the solenoid changes as I = (5A)sin(120t). Find the induced emf in the 15-turn coil as a function of time. 2. Relevant equations emf = -Nd[flux]/dt d[flux] = int[B*dA] 3. The attempt at a solution I have no idea how to start this. I tried doing some basic problems, but I just do not understand any of it.