All Questions
Tagged with voltage conductors
84
questions
1
vote
3
answers
89
views
Visualization of resistance [closed]
What does a resistor do in an electrical circuit? Does it impede the flow of electrons by increasing offering a path that offers a large no. of collisions? How can i visualise it, i have been told to ...
- 19
-1
votes
1
answer
48
views
How do I create a highly conductive vapor cloud? [closed]
I'm working on a project that requires that I create an electrically conductive gas cloud that can conduct voltages as low as 1.5v from a regular double A battery. I've been looking into using mecury ...
- 877
2
votes
2
answers
85
views
How could free electrons flow in a conductor? If electrons actually flow in a conductor, then won't the atoms of the conductor become unstable?
I've read in many physics books that electrons flow due to a potential difference across a conductor, and that the flow of electrons is opposite to the current direction. But, if electrons move from ...
- 23
0
votes
0
answers
77
views
Why is potential difference across resistor different than potential difference across a wire?
As far as I understand, the electric potential is the amount of energy that a third party agent has to spend to move a positive charge from infinite separation to a point. Thus, the electric potential ...
3
votes
3
answers
428
views
Confusion about Circuits
I have two questions:
When dealing with simple DC circuits, it is often said that the electrons in the wire move because the charge density of the surface charges decreases. Is that due to the fact ...
- 308
2
votes
1
answer
166
views
Why is the potential due to induced charges constant?
Over the past few days, I have taken the time to read this interesting paper, where an unexpected counterexample is given that shows how the electrostatic force between a neutral metal conductor and a ...
- 439
1
vote
0
answers
27
views
Do electrons build up at the entrance of a resistor? [duplicate]
There is a voltage drop between the start and end point of a resistor. How does it achieve this difference in potential? For there to be a difference in potential there must be difference in charges. ...
- 135
0
votes
2
answers
79
views
How did we figure out what resistance was?
We were able to figure out that every material offered some resistance.
And we were also able to figure out that there is a constant between current and voltage at a specific temperate.
But how did we ...
0
votes
2
answers
56
views
Does current develops instantaneously as we apply potential difference?
I had this doubt from the starting since I studied current electricity, that if we apply a potential diff. Across a resistor, does the current flow instantaneously, if it does then the communication ...
- 31
1
vote
1
answer
105
views
If a downed powerline contacts the metal chassis of my car, can I touch any metal parts of my car while sitting inside of it?
consider the following situation. I parked my car underneath some high-voltage lines – let’s say 380 kV-lines. Suddenly, one of the lines breaks in the middle due to a storm and one end of the (still ...
- 11
2
votes
1
answer
551
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How do electrons from a battery move through a circuit? [duplicate]
I'm reading a book called Practical Electronics for Inventors and it describes the method by which batteries generate electron flow as follows: the battery releases a few electrons via a chemical ...
- 21
0
votes
2
answers
224
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Infinite Plane of charge between two grounded conducting planes
A question from Zhangwill:
I understand how to arrive at the "correct" solution. Pictured below. It is illogical (even if it follows from solution) that sigma of conducting planes could ...
- 69
1
vote
4
answers
204
views
Short circuit doubt [duplicate]
Short circuits occur when a live wire comes in contact with a neutral wire due to poor insulation and stuff, and the main gist of this word short circuit is the fact that the wire gets heated up so ...
- 85
1
vote
1
answer
122
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Microscopic explanation of potential drop in resistors
I'm trying to understand from basic principles why a resistor causes a drop in potential. Going beyond Ohm's law (which doesn't really explain it microscopically), it seems that each side of the ...
8
votes
7
answers
2k
views
Why is the current the same after passing through a resistor even when the drift velocity goes down?
A resistor converts some of the electrical energy into heat energy, implying that the energy goes down, implying that the force with which an electron moves, and consequently, the drift velocity goes ...
- 83