A basic electrical circuit consists of a battery, a light bulb, a switch and wires connecting...

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Physics

A basic electrical circuit consists of a battery, a light bulb,a switch and wires connecting them. As soon as the switch isclosed, even the light bulb is one mile away, the light bulb willbe on IMMEDIATELY.  This means that the electricalcurrent (made of moving electrons) starts to run everywhere in thewire as soon as the switch is closed . Explain what happen and thesource(s) of these free moving electrons.

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