[Teodor] built his coil using leftover components from his old school, making good use of some parts that might have otherwise been thrown away. The most critical component of his circuit ...

The idea with Tesla coils is that the secondary circuit forms a resonant circuit with the ‘top load’, usually some hollow metal can. This forms an LC circuit with a corresponding resonant ...

This means that the current to the external circuit is always in the same direction ... field increasing the number of turns on the coil The diagram shows four different positions of the coil ...