Why is the speed of electric current the speed of light? Our teacher said that there is free moving charge in the wire, so the light goes on as soon as the power is turned on, just like the water stored in the water pipe Is this a scientific statement? If this is true, the propagation time of electric current needs almost no time. But the speed of electric current is the speed of light. I checked other questions. We said that the essence of electric current is electromagnetic field, and the propagation speed of field is the speed of light What's more, is the formation of electric current really the directional movement of electric charge? Then why is the speed of electric current not the speed of electric charge movement but the speed of electric field propagation? (I know that the speed of electric charge movement is very slow, don't talk about the conclusion, I want to know the reason, ask the big God to answer, don't answer the questions that I don't know.)

Why is the speed of electric current the speed of light? Our teacher said that there is free moving charge in the wire, so the light goes on as soon as the power is turned on, just like the water stored in the water pipe Is this a scientific statement? If this is true, the propagation time of electric current needs almost no time. But the speed of electric current is the speed of light. I checked other questions. We said that the essence of electric current is electromagnetic field, and the propagation speed of field is the speed of light What's more, is the formation of electric current really the directional movement of electric charge? Then why is the speed of electric current not the speed of electric charge movement but the speed of electric field propagation? (I know that the speed of electric charge movement is very slow, don't talk about the conclusion, I want to know the reason, ask the big God to answer, don't answer the questions that I don't know.)

The wire is full of electrons. If the electric field is involved, the electric field will propagate at the speed of light in the wire. The reaction of electrons is also at the speed of light, so the electric appliance is also an instantaneous reaction. In fact, it does not need any electron transfer. So why drive the electric appliance through the electron transfer? Because the electric appliance drive does not need the electric field, but the charge movement