If a device is to use power, it must pass some charges but not freely. If no charges pass - no matter how high the voltage - then no power is used. If charges pass through with no restriction, again, no power is used. Only by partially restricting charge flow can we use power from a power source. Charge flow restriction (resistance) is a characteristic of the light bulb allowing it to generate power from electricity where wires and switches and the surrounding air remain inactive. If we can learn how to use wires and switches and other devices, we can begin to make electricity do what we want.
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