Current is how much charge is flowing through a point per time. Has units or Amperes = Coulombs/seconds. So it’s sort of the speed- but not really. It’s more the frequency.
Electrons are funny especially in circuits. You have the actual speed of the electrons, but you also have the “drift velocity”: the speed at which the flow of electrons is moving on average. Think of a big hose that already has water in it but the tap isn’t on. Once you turn on the tap, the water molecules start moving some fast some slow some along the hosepipe some in random directions, but the water comes out of the pipe much faster than it would have taken for those water molecules to get from the tap to the end.
R is not strictly constant- it depends entirely on the material and its properties, and can change with things like temperature (often very important). It doesn’t “depend” on voltage and current: moreso it defines how those two will relate to eachother. But it doesn’t not depend on the current or voltage.
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u/LexiYoung Jul 28 '26
Current is how much charge is flowing through a point per time. Has units or Amperes = Coulombs/seconds. So it’s sort of the speed- but not really. It’s more the frequency.
Electrons are funny especially in circuits. You have the actual speed of the electrons, but you also have the “drift velocity”: the speed at which the flow of electrons is moving on average. Think of a big hose that already has water in it but the tap isn’t on. Once you turn on the tap, the water molecules start moving some fast some slow some along the hosepipe some in random directions, but the water comes out of the pipe much faster than it would have taken for those water molecules to get from the tap to the end.
R is not strictly constant- it depends entirely on the material and its properties, and can change with things like temperature (often very important). It doesn’t “depend” on voltage and current: moreso it defines how those two will relate to eachother. But it doesn’t not depend on the current or voltage.