Comments by "George Reynolds" (@karhukivi) on "Transistors Explained - How transistors work" video.

  1. An amplifier is not converting DC to AC, that is an inverter.
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  2. That is correct, the outer electrons are the valence electrons and in a metallic molecule, the neighbouring atoms cause the threshold to be lowered and these electrons are then free to move around and become conduction electrons. They do hold energy in discrete amounts in the quantum mechanical domain.
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  3. InpPhysics you use electron flow for gases and also for electrochemistry. However for practical electronic design of circuits it makes no difference whatsoever and as the symbols for diodes and transistors have the arrows by convention, and most people can relate to positive "flowing" to negative, it seems slightly more intuitive. We can blame Benjamin Franklin for calling it wrong 150 years before the electron was discovered!
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