1. The problem statement, all variables and given/known data A galvanometer is connected to a solenoid, and there is a magnet bar entering the solenoid to induce an emf. What factors determine the displacement of the pointer of the galvanometer? 2. Relevant equations emf (induced) = -N ΔΦ/ Δt sensitivity of the galvanometer = θ/i 3. The attempt at a solution That might be an easy question, but my text book doesn't give me the answer and I would like to make sure of my solution. When I read the question I though in various factor: 1. The rate of change of magnetic flux. 2. The number of turns of the solenoid. 3. The resistance of the solenoid. 4. The sensitivity of the galvanometer. I just don't know how to pick the suitable factors to put in my exam, and the most convenient ones for the case mentioned above, i.e. a magnetic bar entering the solenoid to induce an emf. So what is the best answer to the question?