I have observed such spikes when the tip of a half-wave dipole transmitting antenna arcs to ground. Also, through a GDT.
Note: In the diagram above, there should be an AC generator in place of R.
By the same mechanism, these spikes should also happen when an antinode of a Tesla Coil discharges to ground on every swing.
Forest's idea to charge something by electrostatic induction and discharge it by conduction later, is applicable to the above.
In the above post you show two animated drawings with activity along the length of the coil, In Nicks vids he tests with his Led and coil also along the length 'Strange that'. Could that be the right hand rule thing ? Also in Delamoto's diagram the flux rotates around the wire so in that case most of the flux wile be focused or most potent along the length of the coil, thus suggesting the magnetic coil is incorrectly polorised. Just a thought. Sil
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Be aware I'm moderated because I complained about persistent trolls to Chet, folowing me round and got same treatment as perpetrators..This is the third time, You aint doing this again.
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