1. The problem statement, all variables and given/known data Find the turns ratio across the transformer such that a spark is given off at the points AB. The distance from point A to point B is 5.00 mm. AB is the distance across the secondary coil. The frequency and voltage of the primary coil is given. 2. Relevant equations N_p /N_s = V_p / V_s = I_s /I_p 3. The attempt at a solution I don't know where to start. I got it wrong. I was given the answer, but not the solution to the problem. Could I get some help on where to start?