1. The problem statement, all variables and given/known data What is the magnitude of the magnetic field inside the solenoid at t = 1 ms? 2. Relevant equations Not sure 3. The attempt at a solution Well I would make an attempt but firstly I have a question. What I want to know is the above question simply referring to the emf of the solenoid? Is the emf the same thing as the magnetic field? I cannot seem to find an equation relating magnetic fields and inductors.