An ignition coil is an autotransformer, the primary and secondary windings are indeed tied together.
A field isn't enough; one must break the lines through motion; close coupling of currents that are making and breaking contact will induce counter currents but this effect falls off on the square of the distance.
An ignition coil is an autotransformer, the primary and secondary windings are indeed tied together
this is so IN SOME INSTANCES ONLY.
otherwise, you have just invalidated many many repairs that were successfully and properly diagnosed with ohmeters.
I wasn't trying to demonstrate stellar expertise in my post.....only wanted to answer the question with some rudiments. YOU should look into the automotive world to discover which coils are inductive discharge and which are capacitive discharge.....