All Questions
34
questions
-1
votes
2
answers
107
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Potential Divider Circuits
Consider the following circuit:
From my understanding, consider the series circuit without the $V_o$ part. The voltage must be used between resistors $R_1$and $R_2$. We know $V=IR$ from ohms law. As ...
0
votes
3
answers
99
views
Potential drop against internal resistance of cells in combination
Suppose two cells of emf and internal resistance e1, r1 and e2, r2 respectively are connected in series. The negative electrode of 1st cell is connected to negative electrode of the second cell. Why ...
- 1
-1
votes
1
answer
777
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Does current flow inside a battery?
When connected in a circuit, does current flow inside a battery. If yes, in which direction?
- 11
0
votes
1
answer
180
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EMF of source depends on the charge and the path then what do we mean when we say EMF of a source is $\epsilon$?
EMF of an EMF source (a battery for example) is defined as the work done by the non-conservative force(s) on charged particles as it passes through the terminals of the source divided by the charge of ...
- 480
0
votes
0
answers
63
views
Applying KVL to batteries with different EMF in parallel
Consider the circuit diagram below-
Two batteries of different voltages are placed in
parallel, however as I was told that KVL is applicable to all loops if there is no varying magnetic fields, ...
4
votes
2
answers
1k
views
What happens to electrons in a cut wire?
what happens to electrons in a cut wire.
I know it is dangerous but out of curiosity if there was a power cable cut and connected to the outlet, the electrons would be dispersed in the air when they ...
- 41
-3
votes
2
answers
49
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What happens (from the first principle perspective) when you connect 2 negative terminals in a DC Circuit? [closed]
E is the electromotive force, r is the internal resistance.
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0
votes
2
answers
306
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Why current drops when voltage increases?
https://www.youtube.com/watch?v=ubZuSZYVBng&t=329s
In the video above the man put a 200 thousands volt ball near a non-charged one and a very tiny current appear between them. But I think with ...
- 59
0
votes
1
answer
45
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Question on electricity and the basics of potential difference
I am having some difficulty understanding how batteries work. I don't quite understand what exactly potential difference is. My textbook says it is the work done per unit charge to move an electron, ...
- 169
0
votes
3
answers
1k
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How does the battery create an electric field inside the conducting wire connected to its terminal?
In books, it is not explained exactly how the battery creates an electric field inside the wire. Also, is that the electric field inside the wire only or is it present outside the wire as well?
0
votes
0
answers
121
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Why do potential difference between the terminals of an ideal battery remains equal to its $Emf$ even if it is connected externally
In an ideal battery, the battery forces are equal in magnitude to the electric forces (the ones that are present when battery is not connected externally) and thus we conclude that E.M.F. ($\...
- 155
2
votes
6
answers
1k
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Why is internal resistance of battery considered outside the terminals although it is present between the terminals inside the battery
In ideal battery the internal resistance is zero whereas in non-ideal battery there is some internal resistance now this internal resistance is due to the battery material (electrolyte) and is present ...
- 155
3
votes
1
answer
555
views
Why Ohm’s law doesn’t work in these scenarios (inside ideal battery and in vacuum)?
Scenario 1 - Ideal battery
Suppose I have an ideal battery whose electrolyte’s resistance is zero. In the working battery there will be current flowing inside the battery also (due to battery forces) ...
- 155
1
vote
1
answer
93
views
Does the electron in wire too move because of voltage difference?
When we talk about electricity through a circuit because of a battery it is said that the electrons from negative terminal travel to positive terminal of the battery.
I can't help but imagine about ...
- 300
1
vote
1
answer
190
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Explanations for different current values inside a battery
I was just learning about what happens to current inside a battery, and my professor gave an example: Let's say we have a $1$ volt battery connected to a $1 \Omega$ load. Then he claimed that the ...
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