What determines the current capacity of a conductor? How can I know the maximum current, any conductor can carry safely, over shot or long durations of time.
Example:
A conductor that is 1m long, 0.00025m wide, and about 0.003m thick is used to deliver power continuously in a system. How much...
I know that graphene is a far more superb conductor than copper, but I'm trying to compare their weight difference. I mean, let's take an example: A copper busbar that is 7kg with resistance of 2 micro-Ω can carry a lot of current(in kA), I assume a much lighter(possible less than a kg) graphene...
In a DC circuit(Yes, keep going), when current starts to flow, and that current needs a bit of time to stabilize to its maximum value. Since there is change in current(increase) there is an increasing magnetic field, a changing flux... that will induce a -V to the circuit. Eventually when...
How can this be done? We can just add ONLY voltage from another circuit and current from another? And just total out to be new voltage and the same current all around the circuit? What about resistance etc...?
I mean, for me right now I'm struggling with the idea of "voltage" and resistance...
This is VERY interesting, providing voltage from another real circuit, that's beyond me!
I know it's difficult to say without any details, but the time lag... is in the rage of seconds or milliseconds normally?
Btw, I always confuse terms... this whole circuits is a DC circuit.
But the problem to me is with the increase of resistance, to maintain current.
An example:
We have a circuit that's total resistance is 1 Ohm, and V = 5V, I = 5A, P = 25W(and it's changeable to increase voltage). So now, due to the change in the exterior magnetic flux(By a magnet/electromagnet...
sophiecentaur, the total voltage in the circuit would be...? 17V, or 12V?
How is the voltage increased? By using resistors? Wouldn't that change the current at 12V if it we're 12V. Something about PD's basics that I struggle with at times.
Hm, well there are a few example in my head that "Back-emf" is a key aspect. True, that varying magnetic field induces emf, but in some cases it can be emf acting against the source-emf, so that's what I mean by back-emf(or -emf, -V). Still the principle applies, that we can maintain the same...
Im sorry for creating a confusing matter, I didn't attach a diagram because this is more of a general problem.
I wanted to know how to deal with back-emf that's induced by the change in magnetic flux. I wanted to know if it was ever possible to maintain the same current where there is change...
This is an example to help my understanding, hope you all can contribute!
We have a circuit, that has 1 A of current flowing, at 12Volts, the resistance is 12 ohms power consumed is 12W. Back-emf is induced, and its 5V, so now the current is reduced due to that Back-emf. By using a...
Knowing that the principle is possible, is the most important to me. I assumed such an idea would be impossible to maintain the same current while back-emf is induced.