All Questions
Tagged with electricity electrons
320
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Do we have to provide energy to move electrons in an electric field?
In the positive and negative terminal of a battery, there is potential difference due to the accumulation of charges in their respective terminal, so it created a potential difference, and if we ...
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34
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Maximum mean distance electrons can travel in ballistic conduction?
How far in mean distance can electrons reasonably travel via ballistic conduction according to the current model and what is the current mean or average distance or length record for ballistic ...
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3
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81
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About lightning and lightning conductor
Lightning not only strikes on a lightning conductor installed on the building... Lightning can strike anywhere on the surface roof of the building even though that building has installed a lightning ...
- 31
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Why do charges exist in the first place?
Why do charges exist, how did they come into existence? (if any theories exist, then please explain them in somewhat detail)
What would happen if charges never existed?
Please explain the answers at ...
- 103
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Is electric current actually the flow of electrical charge?
In my high school, the definition of electrical current is "the flow of charges" but I have seen a video about how electricity actually works and it seems to me that electrical current is ...
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What is actually electric current? [closed]
Electric current is the rate of flow of charges (electrons) or the rate of flow of positive charge. Okay, I get it. But here's my question. The electron flows in the wire and then the current flows in ...
2
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52
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Electric current density definition
I'm just wondering why the current density $J$ is always defined as the amount of electric current traveling per unit cross-section area $J = \frac{I}{S}$, and not per volume unit $J = \frac{I}{V}$ so ...
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Does the proton do anything in a simple electric DC circuit? [closed]
Since the valence or free electrons and doing the flowing guided by electromagnetic field, what about the protons that are still stuck in the nucleus inside the wire, battery, resistor what have you ...
- 13k
4
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619
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Flow of electrons in wire
If we apply potential difference through wire we know that there is an electric current which is the flow of electrons.I want to know how do electrons move do they move within wire like in the picture ...
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Will a metal rod kept under very bright light for a huge amount of time, be able to conduct electricity?
I was just sitting when it came to me - will a metal rod that has been kept under bright light for a very long time, be able to conduct electricity?
I was thinking that because of photoelectric effect,...
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Electrostatic: do Electrons really go away?
So imagine the classic science experiment where you take an empty aluminium can and a rubber bar that you charge with fur.
At first, that can is electrically neutral.
Two different cases now that I ...
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3
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996
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How can Electricity travel at the speed of light?
If electricity is the flow of electrons, how come it can flow at the speed of light? Shouldn't how fast it moves be limited to a speed lower than the speed of light because it has mass?
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(A10) If light is an EM wave, can it interfere with electrons in a live wire, leading to a change in the wire's current?
Here's my question: If light is an electro-magnetic wave, with oscillating magnetic and electric fields, wouldn't light interfere with the free electrons flowing (slowly) in a wire, as the electric ...
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How to understand JJ Thompson's experiment without defining charge via electrons and protons?
I am beginning to learn chemistry/physics, and I have recently read about JJ Thompson's experiment which led to the discovery of the electron. In every source that I've read, the writers note that ...
- 111
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1
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Why do we call high terminal the positive side?
I want to confirm if I understand something correctly.
We call the "high potential terminal" the positive side (cathode).
Though, electrons move from negative to positive. Logically, ...
- 525