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Physics, Astronomy & Cosmology / Re: Where does the endless supply of electrons come from in a solar panel?
« on: 24/10/2014 08:24:07 »
Fair nuf.
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If you're thinking about this from the perspective of building circuits the pressure analogy is quite reasonable. On smaller scales we have to add some caveats, but it is still an ok descriptor.
Physically it's just pressure resulting from electrons repelling each other and trying to stay apart - pressure difference across an electronic component is measured in volts. Here's a page which provides a clear introduction to the idea without diving straight into jargon about potential: http://www.magicschoolbook.com/science/p-science11.html
Alas no, SS. The "amount of electrons" is charge, not voltage.
The strength of an electric field is measured in volts per meter, not volts.
An amp is the rate of flow of charge past a point. Nothing to do with the speed of electrons, which is determined by the potential gradient.
Magnetic field is measured in tesla or amps per meter, not amps.