All Questions
9 questions
-1
votes
1
answer
240
views
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, ...
- 535
4
votes
4
answers
3k
views
How does Neutral Wire has lower potential than Live Wire?
This is my current(and most probably very incorrect) picture of how electricity comes in my house.
What I think of this picture is that, the transformer produces current in my house circuit (by ...
- 1,306
0
votes
1
answer
229
views
Why the potential at positive terminal is considered to be high?
even though it's the electrons that move from negative terminal of the battery and gets move along the external circuit and finally enters the positive terminal of the battery and due to battery force ...
- 29
1
vote
2
answers
49
views
Why are voltage and volt both are denoted by $V$? [closed]
Why are voltage and volt both are denoted by $V$? Won't it cause confusion?
2
votes
1
answer
286
views
Confusion on negative charges, current, and direction
My text book seems to have two contradictory statements about the same subject. Under the electrical potential and capacitance chapter, it says that negative charges move from lower to higher ...
- 217
1
vote
2
answers
212
views
What physically determines what voltage something has? [closed]
I know that voltage is energy per charge / energy per electron, but since something such as a wall outlet has 120V with a lot of current but a mostly harmless low current Van De Graff generator has ...
- 635
5
votes
4
answers
270
views
Why standard voltage is $110/220~\mathrm{V}$ and not $500~\mathrm{V}$?
Why do we have standard voltage $110/220~\mathrm{V}$?
I mean electricity delivery savings (or wastage when heating the to thin cable) by switching to higher voltage would be enormous more power ...
- 1,135
84
votes
6
answers
24k
views
Why does public mains power use 50-60 Hz and 100-240 V?
Is there a physical reason behind the frequency and voltage in the mains electricity? I do not want to know why exactly a certain value was chosen; I am rather interested to know why that range/order ...
- 25.3k
8
votes
4
answers
53k
views
How can you have a negative voltage?
How can you have a negative voltage? I don't really understand the concept of negative voltage, how can it exist?
- 97