All Questions
7
questions
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votes
1
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107
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When finding electric potential and electric potential energy is it all adding the total?
I am not sure what the difference is between the two. For example, when I add the total of all the potential for every point charge isn t that finding the potential energy since you also add all the ...
user361546
1
vote
2
answers
105
views
Why is the sense of the electric field the one that goes from the highest to the lowest values of an electric potential?
To clarify, what's the reason behind it and why is it not the opposite?
- 13
0
votes
0
answers
39
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Electric potential energy between fast moving charges
It is well known that in static system, electric potential energy of system conducted with two sphere charges, $q_1$ and $q_2$ with distance $d$ and radius $R$, is $E=\frac{q_1 q_2}{4\pi\epsilon_0 d}+\...
- 254
4
votes
1
answer
693
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Energy Stored in a Configuration of Point Charges
Original Question:
The potential energy stored in a system of $n$ charges is:
$$\frac{1}{2}∑_{i=1}^{n}q_i ∑_{j≠i}^{n}\frac{kq_j}{r_{ij}}=\frac{1}{2}∑_{i=1}^{n}q_i \phi(q_i)$$
In the above, $n$ is ...
- 3,075
0
votes
1
answer
174
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Motion of an electron near a proton [closed]
Statement of the problem:
Consider an electron and a proton that are initially at rest separated $a$ meters. Do not take into account the movement of the proton, because its mass is much greater ...
- 163
0
votes
2
answers
283
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Lagrangian of a moving charge distribution under action of an eletromagnetic field
We all know that for a single charged particle, we can derive the Lagrangian starting from Lorentz law of force:
$$
\mathbf{F}=q(\mathbf{E}+\mathbf{v}\times\mathbf{B}).
$$
and by using the ...
0
votes
1
answer
335
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Potential energy between 2 moving charges
Let's say we have 2 positive charges repelling each other along a line.
Initially they are pretty close and over time get far away from each other.
The key is that both charges are allowed to move and ...
- 301