- #1
Bassalisk
- 947
- 2
Greetings,
I am studying electrical engineering, and one thing puzzles me. I learned that by convention, in solving electrical problems, current is going from plus to minus(direct stable current) as a consequence of electric field lines going from plus to minus charge. Later I learned that electron flow goes from minus to plus, which is reasonable.
Now, example.
(+) ------X------X------ (-)
----------> I
Let X's be 2 light bulbs. Given the situation that we have a metal conductor and the most of the current is carried by electrons, which will light up first? I mean, they cannot light up instantly at the same time, that would imo break the speed of light.
And can you explain to me a bit more, how current "flows" i know that charges are slow and going about a half a centimeter a second, but the current is almost instant! How come?
This mainly came from experiment with LED diodes which light up only when a specific current direction is applied, anode goes to plus side and cathode is going on the minus side(if possible, explain how LED diodes work or post a link, thanks)
Thank you
I am studying electrical engineering, and one thing puzzles me. I learned that by convention, in solving electrical problems, current is going from plus to minus(direct stable current) as a consequence of electric field lines going from plus to minus charge. Later I learned that electron flow goes from minus to plus, which is reasonable.
Now, example.
(+) ------X------X------ (-)
----------> I
Let X's be 2 light bulbs. Given the situation that we have a metal conductor and the most of the current is carried by electrons, which will light up first? I mean, they cannot light up instantly at the same time, that would imo break the speed of light.
And can you explain to me a bit more, how current "flows" i know that charges are slow and going about a half a centimeter a second, but the current is almost instant! How come?
This mainly came from experiment with LED diodes which light up only when a specific current direction is applied, anode goes to plus side and cathode is going on the minus side(if possible, explain how LED diodes work or post a link, thanks)
Thank you