1. The problem statement, all variables and given/known data Given: u_0 = 1.25664e-6 A 2 m long large coil with a radius of 14.6 cm and 320 turns surrounds a 4.2 m long solenoid with a radius of 4.6 cm and 7700 turns. The current in the solenoid changes as I = I_0 sin (2pi*f*t) where I_0= 30 A and f=60 Hz.Inside solenoid has 7700turns and outside coil has 320 turns. The equation for the emf is E = E_0sin(omega*t). There is also a resistor on the smaller coil that is 25 ohms. Find the maximum induced emf in the large coil. Answer in units of V. 2. Relevant equations Magnetic field = B = u_0 * I / (2*pi*r) Flux = BA 3. The attempt at a solution I found the magnetic field of the solenoid (0.069115sin(120*pi*t)) and the area (0.006648). I then multipled BA to find the flux which is (0.000459 sin(120*pi*t)) Then I found the magnetic field of the outer coil ((0.006032sin(120*pi*t)) and the area to be 0.066966. The magnetic flux is BA = (0.000404sin(120*pi*t)) Now I am truly stuck because I've no clue where to go from here. Please help! Many thanks.