The most common misconception in electrical science in general is that currents are "caused" by voltages. It's not true. The light bulb that illuminates your room can be used for example. Does the voltage across the filament cause the current? Or does the current through the filament cause the voltage? The only rational answer is that neither can exist without the other. It is a circular relation. For the bulb to output heat and light, which is power, power must be inputted. The input power is the product of current and voltage. Both must be non-zero to light up the bulb. The light requires both current and voltage. Because the power source is constant voltage, people can rush to judgement that voltage comes first, then current. But the constant voltage source is that way because the power company forces it to be that way. They could provide constant current, but the losses in the lines would increase.
And in a ideal short circuit.
BTW,
"Nullators are strange in the sense that they simultaneously have properties of both a short (zero voltage) and an open circuit (zero current). They are neither current nor voltages sources, yet both at the same time."
Sorry, but a load of rubbish!.
You can have voltage and no current, but you can't have current and no voltage - of course the voltage causes the current.
Hi Willbe,
He he, that's funny. I have to also think about superconductors here.
Only between two charged bodies in a vacuum, if there's matter involved there'll always be a small leakage current - capacitors slowly dissipate thier charge, a small current leaks through the gate of a MOSFET.You can have voltage and no current,
Rubbish, what do you think superconductors are?but you can't have current and no voltage
But you can't show scientific reasons to support your position.
You can have V w/ no I only under *static* conditions, i.e. a charged cap with a steady dc voltage. This is all V no I.
sigh
Is there a short but reasonable explaination suitable for teenagers?
I was a bit amazed by the squabble.
The PDF is in a presentation format and needs some explanitory text.
I have at least 2 weeks of programming to teach prior to going back to electronics and teaching transistors. If you (or anyone) comes up with more info please post it. I am out of my element so a bit of digging and study will be required. Like they say, if you want to learn a subject teach it.
It is hard to imagine that info at the level I need is not on the web. I will look further and if needed start writting.
one gets subjected to questions that never seem to amaze
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