Linked Questions

12
votes
4answers
30k 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
27k 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
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 ...
-2
votes
4answers
23k 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 ...
2
votes
4answers
13k 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?
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
1k 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
544 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 ...
2
votes
2answers
362 views

How can “…electrons flow in metals, but not in the ground…” explain grounding rods?

I really enjoyed Why is the charge naming convention wrong? But, in the comments at the very end, the statement that "...electrons flow in metals, but not in the ground..." left me uneasy. I was ...
-1
votes
1answer
764 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 ...
1
vote
2answers
431 views

Direction of Current

All the questions that have asked relating to this topic have been too advanced for my high school-physics mind, but I am still interested in knowing it so here goes: I always thought that current in ...

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