All Questions
14
questions
-1
votes
4
answers
120
views
Why do electrons move in a circuit? [closed]
I am trying to make sense of why electrons move in a circuit.
I did my research and the first answer I got is because of the difference of electric potential between the two points of the battery that ...
3
votes
2
answers
144
views
Fermi level of metal
Do metals have fermi level? As we know conduction band and valence band are overlaped for a metal. Does it make any sense for metals to have fermi level?
- 209
2
votes
0
answers
122
views
Is it possible to force charges into one plate of a capacitor?
As we know, a capacitor stores energy, but the net amount of charge in it doesn't change. If an electron enters one plate, another leaves the other plate. If the other plate is floating, the entering ...
1
vote
1
answer
1k
views
How does a single phase shared neutral circuit actually work, physically?
Okay so this is a two part question. First Question is probably more of an ELI5 question. But I am a fairly experienced electrician (NOT AN ENGINEER mind you.) but I have a generally good working ...
6
votes
3
answers
1k
views
How do electrons carry thermal energy in Peltier coolers?
I've read that when electrons enter from metal to semiconductor type N, they gain thermal energy and make that side cooler and the reverse happens when they leave semiconductor to the conductor.
Why ...
- 215
0
votes
2
answers
95
views
current speed/flow [closed]
Note
my questions are in form of explaining. its because I've scattered information (or assumptions) and it want to link them. that's probably why you can see me explaining to much?
Question part:
...
- 499
1
vote
2
answers
475
views
Will electrons be taken from a metal plate if a positive charge is applied to it?
If I have a single metal plate, a battery, and one wire. If I connect the wire to the positive on the battery to the metal plate, does that remove electrons from the metal plate?
I am attempting to ...
- 433
2
votes
3
answers
2k
views
Why the earth attracts charge and where does the charge go when it goes into ground?
Self-explanatory question but to add what I know, by this I will also know if I am right or wrong.
I read somewhere that Earth is positively charged, but is not the state (whether positive/negative) ...
- 117
0
votes
2
answers
86
views
Effect of electron discrete nature on current density
Coulomb’s law states that the current that flows through a wire is proportional to the applied voltage. For sure there are many physical effects (linear and non-linear) that participates in the ...
- 1,399
2
votes
2
answers
314
views
Why do electrons move as if on conveyor belt in a circuit?
For example sometimes people will ask whether it matters what side of a component you place a resistor on. Surprisingly, it doesn't matter because electrons behave as if they're all connected together ...
- 123
0
votes
2
answers
249
views
Why don't electrons in parallel battery circuits repel?
Here is a short snecdote, which will give a good explanation into my question.
I was in a science class, and we were doing a circuit with a very small filament light bulb, and some AAA batteries. I ...
- 3
-3
votes
6
answers
5k
views
How to function a TV electron gun for experiments [closed]
right to the point, I'm study physics and I want to do some experiments like q/m, oscilloscope, etc and I needed an electron gun. I had an old crt TV and I took out it's electron gun and vacuum tube ...
- 103
1
vote
1
answer
140
views
When do the holes in semiconductor appear?
I'm trying to understand the concept of semiconductors, as far as I know whenever an electron moves it leaves a hole, so how can we say (for example) that n-type semiconductor has a majority of \$e^-\$...
- 113
1
vote
2
answers
820
views
Meaning of applied voltage on electron
Does the applied voltage create a force on electrons to make them move? I have read that electric field is force per charge. Now, metals have free electrons, so applying a voltage will cause these ...
- 41