- #1
rotatingjedi
- 2
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A flaw in the electrical current model??
I'm not a Physicist...please don't change the channel, but I am very interested in Physics and have recently hit a brick wall with the electrical current model.
If it is said that electrons are the carriers of charge and that they receive this charge from a power supply (AC or DC) and also that electrons travel at incredibly slow speeds (even when varying resistivity is taken into consideration) through a circuit...here it comes, "How is it possible that switching ON a circuit results in almost instant transfer of the energy carried from the electrons to the device within the circuit??"
Let's say there is 2 metres worth of wiring from power supply to the device itself, surely if the electrons receive their charge from the power supply they would have to travel that 2metres distance in order to make the device work...? I may be using the words energy and charge incorrectly here... as charge is measured in Coulombs and energy in Joules but I hope someone out there can understand my confusion and help.
I am pretty sure it's not possible for electrons to receive energy/charge from a power supply...travel towards the device, then when said device is switched off hold that charge until the power supply is switched on again...
Like I said, I am quite obviously not a Physicist...what I know is self-taught (probably only to higher GCSE level) but again I hope someone can help me.
Thanks
I'm not a Physicist...please don't change the channel, but I am very interested in Physics and have recently hit a brick wall with the electrical current model.
If it is said that electrons are the carriers of charge and that they receive this charge from a power supply (AC or DC) and also that electrons travel at incredibly slow speeds (even when varying resistivity is taken into consideration) through a circuit...here it comes, "How is it possible that switching ON a circuit results in almost instant transfer of the energy carried from the electrons to the device within the circuit??"
Let's say there is 2 metres worth of wiring from power supply to the device itself, surely if the electrons receive their charge from the power supply they would have to travel that 2metres distance in order to make the device work...? I may be using the words energy and charge incorrectly here... as charge is measured in Coulombs and energy in Joules but I hope someone out there can understand my confusion and help.
I am pretty sure it's not possible for electrons to receive energy/charge from a power supply...travel towards the device, then when said device is switched off hold that charge until the power supply is switched on again...
Like I said, I am quite obviously not a Physicist...what I know is self-taught (probably only to higher GCSE level) but again I hope someone can help me.
Thanks