Linked Questions

17
votes
3answers
6k views

If electrons were positive and protons were negative, would life be different? [duplicate]

This was a question on a worksheet during my first week in a class on Electromagnetism. The answer is essentially: No. Life would be no different if electrons were positively charged and protons ...
11
votes
1answer
14k views

Who (and Why) started the “electrons are negative, protons are positive” convention? [duplicate]

For some reason everyone labels electrons using a minus sign and protons using a positive sign, even though the opposite seems more intuitive: Who started the convention that electrons should be "...
3
votes
2answers
9k views

Why are electrons defined to have negative charge? [duplicate]

We normally think of the "default" or "root" state of things as being on the positive side of the spectrum. For example, we don't normally use a + symbol to ...
0
votes
0answers
11k views

Why do current and electrons flow in opposite directions? [duplicate]

In representing an electric circuit, we would draw the sense of the current from the positive to the negative pole and the electrons from the negative to the positive . But as I know electrons' motion ...
1
vote
2answers
824 views

What is the difference between poisitive and negative charge? [duplicate]

I would like to know what charge actually IS. Not the 'flow of electrons' charge but the charge because of which protons and electrons attract. I want to know why these attract and what the difference ...
0
votes
2answers
1k views

Why is the charge of a proton positive? [duplicate]

Is there a reason that a proton has a positive charge while an electron has a negative charge? Are these just names that were given to the charges or was there a reason for making a proton have a ...
0
votes
1answer
1k views

positive charge , current and electron flow in a simple circuit …confusion [duplicate]

my question is that in a simple circuit one wire attached with battery cell ,and then electrons start flowing from lower potential to higher and as we know in metal wire only electron is the thing ...
0
votes
1answer
735 views

Why are electrons negative? [duplicate]

By my understanding their charge could have been called positive, and the charge of the proton and positron called negative. What are the historical reasons for this?
1
vote
0answers
210 views

Why aren't electrons positively charged? [duplicate]

For the study of electric circuits, it seems like it would have made more sense to establish that electrons carry a positive charge, and protons a negative one. That way, arrows representing current ...
0
votes
1answer
108 views

Why are electrons negetively charged? [duplicate]

Why have we assigned a negative charge to electrons (and positive for protons)? I feel it would be easier if electrons were positive (thereby, protons negative)- electrons would flow in the direction ...
1
vote
1answer
81 views

Please tell me that why aren't we discarding the conventional flow of current despite not being in sync with principle of potential difference [duplicate]

electric current flows from higher potential area (negative terminal) to lower potential area (positive terminal).this clearly indicates that electric flow (flow of electrons) takes place from ...
0
votes
4answers
61 views

Electron flow and electric field question [duplicate]

My understanding is that the electric field lines of a proton goes outwards and an electron goes inwards, are theses properties the same for electron flow or is just for conventional current? I think ...
0
votes
0answers
39 views

Can the signs of charge of electron and proton be reversed? [duplicate]

I was thinking that the electron, proton, neutron etc. are human given names to some particles. So, are the signs, positive of proton and negative of electron, given just to show their opposite ...
0
votes
0answers
8 views

Direction of the current and the electrons [duplicate]

If the electric current is defined as Coulomb/second, why is the direction of the current is just the opposite of the direction of the flow of electrons?
38
votes
5answers
24k views

If the Earth is a good conductor of electricity, why don't people get electrocuted every time they touch the Earth?

Since the Earth is a good conductor of electricity, is it safe to assume that any charge that flows down to the Earth must be redistributed into the Earth in and along all directions? Does this also ...
23
votes
3answers
17k views

How can the Hall effect ever show positive charge carriers?

The Hall effect can be used to determine the sign of the charge carriers, as a positive particle drifting along the wire and a negative particle drifting the other direction get deflected the same (as ...
12
votes
6answers
10k views

What are “electron holes” in semiconductors?

I'm tutoring senior high school students. So far I've explained them the concepts of atomic structure (Bohr's model & Quantum mechanical model) very clearly. Now the next topic to be taught is ...
13
votes
4answers
34k views

Why is an electron negatively charged, and what is the difference between negative and positive charges?

Nobody has yet defined the actual meaning of a charge, or why a negative charge is different from a positive charge. Everybody knows that positive charge is due to protons and negative charge is due ...
2
votes
3answers
30k views

Direction of current and direction of flow of electrons

My textbook says that the flow of current is from the positive to negative and my notebook say that the flow of electrons is from negative to positive. Why aren't they agreeing on one direction? Who ...
3
votes
6answers
17k views

What is the difference between conventional current and electronic current?

what is the difference between conventional current and electronic current? How are they linked to one another?
-2
votes
4answers
27k views

How can we know that a particular charge is positive or negative?

Suppose I am provided with a positive is charged....and someone tells me to find which type of charge is present in it? Then how can we detect that the body is positively or negatively charged? Is ...
3
votes
4answers
4k views

Potential energy sign conventions

Almost every book on physics that I read have some weird and non-clear explanations regarding the potential energy. Ok, I do understand that if we integrate a force over some path, we'll get a ...
5
votes
4answers
1k views

More about the right hand rule?

We started learning about electromagnetism in physics class, and the Right Hand Rule comes in handy as seems easy to use, but I'm curious as to how it actually works. I guess it's more of a math ...
1
vote
5answers
3k views

Why is charge of the electron negative?

How did scientists figure out that the charge of the electron was indeed negative? I know how the cathode ray tube experiment works, but how did Thompson know that the plate that the cathode ray beam ...
2
votes
1answer
2k views

Positive test charge

Protons have positive charge on them. Protons aren't mobile. So how can a positive test charge move from the negative terminal of a cell to the positive terminal and gain electric potential energy? ...
4
votes
1answer
411 views

What proved Conventional sense wrong?

What fact proved for the first time that the conventional sense of current was wrong? And when it did happen? As a corollary of this question, why do we say that electrons have negative charge? Is it ...
2
votes
2answers
1k views

Which charge actually moves to constitute current? Positive or negative?

Now this might be a very stupid question for many readers, but I am getting really confused. I was reading about electricity and current, and I read this: Suppose we connect a wire to the ends of a ...
0
votes
3answers
2k views

Why is conventional current still used in schematic diagrams?

I am a beginner in electronics and i am learning on my own. I am currently reading this book "Electronics for dummies" and after reading some pages of this book i have a LOT of questions. I know about ...
2
votes
2answers
747 views

Conventional current and electric current

When an external field is applied ,then electrons move in the direction opposite to that field, I want to know that does conventional current moves in the direction of field? A confusion is there in ...
-1
votes
1answer
877 views

Why is it said that electric current always flow from higher potential to lower potential?

Why is it said that electric current always flow from higher potential to lower potential? It is said that current flows from positive terminal to negative terminal, but it is actually the negative ...

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