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Questions tagged [electron]

Anything related to the behavior and properties of electrons, i.e. the elementary subatomic particles accounting for electrical conduction in most solid materials, especially metals.

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1answer
144 views

how the electrical resistance can stop the flow of electrons? [closed]

what important elements can relate to electrical resistance when considering about the resistance effect and force? i find some equations may be concerned,like the Ohm's law,R=V/I.V is voltage and I ...
3
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4answers
3k views

Does the resistor have to be before or after the component [duplicate]

I am an electronics beginner and I created a small little circuit, just a battery a resistor and a led, then to ground. This is the circuit: simulate this circuit – Schematic created using ...
12
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3answers
23k views

How does data travel inside a wire?

I know this is a very basic question but the answers returned by google are way too complicated for me to understand. I am not asking about modulation here. What I want to know is what exactly is ...
27
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12answers
20k views

Is voltage the speed of electrons?

Current is the amount of electrons passing through a wire. Can we say that voltage is the speed of those electrons?
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1answer
856 views

Cause of skin effect: eddy current inside conductor

We all know very well that due to eddy current (back EMF) generation within an AC carrying conductor, "skin effect" occurs. Eddy current density: Highest at center of conductor core Lowest at ...
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3answers
146 views

is there any impact of Electron's spin in CRT?

fact-1. Electron's (or any-other particles) magnetic behavior depends upon mass, charge and spin. fact-2. All electrons are not the same. Though all electron have the same mass and charge; an ...
1
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1answer
2k views

How do laser printers produce the positive and negative charges on the paper?

I understand the general idea of how it works but I am a little confused on the actual details. For instance I understand that the corona wire positively charges the entire drum and the laser then ...
0
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3answers
737 views

I want to learn how to make a CPU from scratch [closed]

I am new to electronics, I program from time to time and i know the basics of the logic gates. I have used logisim in the past and I was just wondering if someone could tell me about a good online ...
7
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4answers
5k views

Antistatic mat , how it works?

I have a large anti-static mat lying on the table of my workdesk, which looks like this. And it's connected to ground through the wall outlet from one point, meaning it's an open-loop: Let's say I ...
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4answers
5k views

What happen to electricity when you turn off the lights

Sorry if this is the wrong place, but hopefully someone here can help me OK so the way I have been taught is that turning off the lights doesn't really actually save electricity due to the fact that ...
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3answers
169 views

PN junction diode's free electrons

When we look at the PN junction diode, there is always a depletion region, for which one side in negative and one side positive. The reason behind this is that the N side depletion region is ...
4
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2answers
926 views

Protons and DC circuit

In a metal wire, do protons flow in the opposite direction from the positive terminal, like electrons do from the negative terminal towards the positive terminal?
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6answers
2k views

Can vacuum be used to store flowing electrons?

Since electricity can flow through vacuum can it also be used to store electricity? Though it wont remain a vacuum in strictest form.
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2answers
909 views

If an electron has 0 electric potential after passing through a resistor, how does it flow to the other terminal

If an electrical circuit only contains 1 resistor, and electron's potential difference (voltage) before and after passing through a resistor is equal to the e.m.f, how does the electron have potential ...
0
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1answer
436 views

current flow from positive to positive between batteries?

If you have two batteries with different voltages, let's 12 and 9 volts and you connect the negative terminals while you put a LED or whatever between the positive terminals, there will be current ...
0
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2answers
197 views

Raspberry Pi: Do the electrons flow from the power pins or ground? [closed]

I'm rather new to this and am slightly confused about which direction the electrons actually flow. Using an LED with the knowledge that conventional current flows out of the cathode, and hence the ...
3
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2answers
166 views

Electron Flow Confusion

Using conventional notation in the diagram below, I understand that the circuit is not complete because the diode is in reverse bias. But knowing that the electrons actually flow from the negative to ...
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6answers
7k views

positive vs negative, power vs ground, flow direction

I'm getting very confused about the inconsistency where some people say ground is always negative, and some say ground is always positive. And some would say, electrons travel from the power source ...
2
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2answers
110 views

At what acceleration will electron flow be disturbed?

Came across a question regarding max G force that electronics can withstand, and immediately wondered at what speed/force will the electron flow be disturbed, and/or stopped. I might not be thinking ...
0
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2answers
936 views

From a 3.3v Pin do we separate Positive and Negative flow? If so, how?

If we do not separate Positive and Negative flow, what is the flow from a 3.3V connection? A Little more background on why I ask this question and my confusion follows I have been reading simple ...
2
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2answers
4k views

Why is CMOS fall time faster than rise time?

I've just started a computer architecture class, and the slides from a lecture says that the reason why fall time is faster than rise time is that the NMOS electrons have more mobility than PMOS which ...
0
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2answers
24k views

Is ground (GND) possitive or negative? [duplicate]

I have been researching the electron flow which goes from negative to positive in a battery. Since ground the returning point in a circuit, shouldn't ground be the positive terminal?
1
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2answers
578 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 ...
10
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4answers
2k views

Does current flow on an open transmission line?

Please take a moment to look at the diagram below: The question is if the lightbulb will momentarily flash when the switch is closed. I think it will but I get the feeling I am wrong. The reason why ...
3
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2answers
361 views

How does an electron beam move in XY mode?

I was recently observing some Lissajous figures on an analog scope in XY mode . I was wondering how does the electron beam move . I know it should move from left to right but I find it difficult to ...
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1answer
105 views

Motor without magnetism [duplicate]

Every electric motor I know, takes electricity and converts it over a magnetic field, for generating movement. Is it possible to generate significant movement, based only only on electrons movement?
7
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7answers
3k views

Transistor - Why does amplification happen before the transistor and not after?

I know this is a noob question but I just can't find an answer for it on google search results. Well my question is basically this: How come the amplifying occurs before the transistor [red line] and ...
0
votes
1answer
536 views

Can an electron carry only one charge?

Sorry if this has been asked before. Could also be a really basic question (new to electrical study). I am a bit confused about the relationship between electrons and charges. So what I understand is ...
9
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3answers
2k views

Flow of electrons in a wire

Electricity is "flow of electrons". My child asked me if this is so, then ultimately the copper wire should disappear/vanish/finish because the matter is moving from one place to the other. I am not ...
19
votes
9answers
23k views

How is the internet able to transmit data so fast?

I'm not sure if I'm in the right place or not, but I figured someone here could maybe provide a good answer. I want to know how electricity is able to flow so fast. For example videos games nowadays, ...
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1answer
325 views

What happens when a conductor gains potential, but is not completing a circuit

I asked this on the physics stack initially, but I think it could also be appropriate here. I am not confused about how a conductor gains the same potential as the lead it is connected to (in the ...
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3answers
522 views

Electron flow at the immediate start of this flip-flop circuit?

I am attaching the following image of a flip-flop circuit. I find myself constantly trying to visualise what is occurring at the exact moment the circuit is closed, and the current starts (electron ...
3
votes
2answers
377 views

Why is electron flow taught in some contexts? [closed]

The standard as I learned it is that the flow of current is from positive voltage to negative voltage. The direction of current flow is opposite the direction of electron flow. This is what I learned ...
1
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3answers
502 views

What happens to a DC current at the end of a wire?

This question might be a little more appropriate for the physics stack, but I'd like to test the water here first. I am just getting into electrical engineering, and as I go along, certain aspects ...
2
votes
1answer
226 views

Is there a limit on the charge that can flow in a wire?

I assume when I hook up a 12V battery to a wire, all the free electrons in the wire move. If I hook up 24V, they move faster so more charge passes a area cross section for i=C/s. But in AC, their ...
3
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4answers
2k views

Does free electrons from the conductor itself flow or electrons inside the battery flow?

I am new to electronics. I read electricity works this way: some atoms have more electrons than protons. These free electrons flow through a conductor such as a copper wire. However, to induce flow of ...
10
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4answers
4k views

Flow of holes in transistor?

Bipolar transistor are said to have both electron flow and hole flow. Movement of electrons can be understood, but holes are fixed part of the atomic/crystal structure. How can we characterize their ...