1. The problem statement, all variables and given/known data A solenoid 10.0 cm in diameter and 75.0 cm long is made from copper wire of diameter 0.100 cm, with very thin insulation. The wire is wound onto a cardboard tube in a single layer, with adjacent turns touching each other. To produce a field of 9.80 mT at the center of the solenoid, what power must be delivered to the solenoid I think I = 20 am I right? 2. Relevant equations B=Uo * (N/l) * I P= IV? 3. The attempt at a solution I am stuck at getting the power, I have no clue how to get potential from a magnetic field alone? Or if i Say P= work/time I don't know how to get work. And i'm not sure if my Current is correct. Any help is much appreciated.