THE “ELECTRICITY” INSIDE OF WIRES MOVES AT THE SPEED OF LIGHT?

Wrong. In metals, electric current is a flow of electrons. Many books claim that these electrons flow at the speed of light. This is incorrect. Electrons actually flow quite slowly, at speeds on the order of centimeters per minute. It’s the energy in the circuit which flows fast, not the electrons. When the electrons at one point in the circuit are pumped, electrons in the entire loop of the circuit are forced to flow, and energy spreads almost instantly throughout the entire circuit. This happens even though the electrons move very slowly. To aid your understanding, imagine a large wheel. If you give it a spin, the entire wheel moves as a unit, and this is how you transmit mechanical energy almost instantly to all parts of the wheel’s rim. But the wheel itself didn’t move very fast. The material of the wheel is like the electrons in a wire. Electrical energy is like the “jerk,” the mechanical energy wave which you sent to all parts of the wheel when you gave it a spin. Mechanical energy moves incredibly quickly to all parts of the wheel, but the wheel’s atoms didn’t have to rapidly travel anywhere in order for this to happen.

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About Rob W Harrison
There is a part of my mind that stubbornly thinks about science. I have a life, job, wife and family but without my Van Der Graaf Generator life would be incomplete. I am a great believer that this amazing universe came into being through process: movement >pressure > density > mass. Maybe I believe in an non viscous ether. Anyway this is where I can share my thoughts.

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