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In am Electrical Generator, where do the Electrons come from?

by timejim
Tags: electrical, electrons, generator
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May3-06, 09:16 PM
P: 459
Here's a diagram of what everone is saying. It's simple circut with a battery but it's the same effect as a generator. Bascially when the electorns go though the light bulb they lose energy form the energy conversion then they go back to the - side of the battery and get more energy form the battery. This will contuine until things 1) the battery dies 2) you noticed how there's a wire going back to the battery form the lightbulb if that wire gets disconnected there will be no constant supply of electorns to pump the energy into the light bulb.
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May5-06, 01:30 AM
P: 173
I always like to explain the ping-pong ball analogy with a pipe filled with water. When you turn on the 'switch' it's like putting a drop of water in one end of a water filled pipe. On the other end, out comes a drop, but overall the water in the pipe didn't really move. This can be applied to drift velocity because when the electricity flows through the wires, it isn't travelling like a car on a's just "bumping other electrons down the line up a notch".
Jan10-09, 07:16 AM
P: 22,315
That just plain isn't how electricity works. A charged battery does not have more electrons in it than a discharged battery. There is no loss of electrons in an electric circuit.

Also, please reread the PF guidelines - this is not a place for indulging your own speculation, this is a place for learning real science.
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Jan10-09, 08:33 PM
P: 1,070
Quote Quote by 1Scott1 View Post
Actuly it deos, it's a proven fact the electrons do not go back into the orbits of the atoms without a strong external force such as a spark, or flame, and you would not have an EMF or voltage if there where not free electrons (in a battery's case.)
there's plenty of "external force" here, the chemical reaction going on inside the battery. you can think of this like a flame if you wish, since a flame is just a chemical reaction and the heat it produces.

batteries simply do not have excess charge. if they did, like batteries would repel each other, and you would notice because electrostatic forces are very strong. but there is not excess charge and no repulsion or attraction.

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