Do electrons in a typical DC circuit come from the battery, or....?

...do the electrons already present in the copper wire simply move around the circuit due to the potential difference in the battery? Some explanations I've read suggest that they are stored in the cell and travel from it, round the circuit and back to it again. Whilst others suggest that the potential difference in the battery simply forces the electrons existing in the wire to move around and through the battery.

Which is it?

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  • 1 decade ago
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    The electrons in the circuit come from all elements of the circuit including the wires. The battery only forces the electrons to move in a certain direction. If electrons were "stored" in the battery, there would be no need for both a positive and negative terminal. The suggestion that batteries store electrons is incorrect. All a battery does is give the electrons potential energy and moves them in the circuit.

  • 1 decade ago

    if it comes from the battery , then what is the difference between a conductor and insulator !

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