Again with respect. In a simple circuit you are correct. There are two differences (in my reasoning) the first is the fact that part of the current flow is to the sparkplug (and thus ground) that is generated by the discharge (collapse) of the flux in the coil as points break. The second is the LC interaction between the coil and ground as in the clip from Wiki.
At the same time, current exits the coil's primary winding and begins to charge up the capacitor ("condenser") that lies across the now-open breaker points. This capacitor and the coil�s primary windings form an oscillating LC circuit. This LC circuit produces a damped, oscillating current which bounces energy between the capacitor�s electric field and the ignition coil�s magnetic field. The oscillating current in the coil�s primary, which produces an oscillating magnetic field in the coil, extends the high voltage pulse at the output of the secondary windings. This high voltage thus continues beyond the time of the initial field collapse pulse. The oscillation continues until the circuit�s energy is consumed. If it is run on a scope, and is clearly the same pattern, I would be amazed. Jim
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