All Questions
50
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Electric potential energy, Electric potential and self-energy of a body
The total work done to bring all the charges constituting a body from infinity to the body one by one is called the electrostatic potential energy of the body. And if I divide the expression of ...
- 69
0
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1
answer
30
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Apparent contradiction while calculating potential inside shell due to off center charge
Consider the following scenerio$-$
A point charge $Q$ is placed at an off center point $B$ in a spherical shell made out of a conducting material. We are required to find the potential at the center.
...
- 428
-1
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1
answer
39
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Would it be right to say that “Electric Potential” = the potential energy of an individual unit of charge at a certain point in a electric field?
Any replies from people who actually understand the topic (better than me, to say the least lol) and are able to clarify the topic (unlike my teacher), are highly appreciated and encouraged.
- 11
2
votes
4
answers
263
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Electric Potential and Potential Energy
Electric Potential definition is as follows:
Electric potential (also called the electric field potential,
potential drop, the electrostatic potential) is defined as the amount
of work energy needed ...
- 65
0
votes
0
answers
28
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Electric potential significance [duplicate]
What is the physical significance of electric potential? I know that over dx length of an electric field it varies but let us assume the field to be uniform, how exactly does the potential still ...
- 1
0
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1
answer
73
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Disagreements in derivations of electrostatics
In the derivation of the potential energy of electrostatic systems we get (I am working in cgs)
$$W=\frac12\int\phi\,dq=\frac12\iiint\phi\rho\,d V \tag{1}$$ But $$\vec\nabla\cdot\vec E=4\pi\rho$$ Thus
...
4
votes
1
answer
359
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What does negative electrical energy signify?
When we derive the formula for potential energy caused by the torque of a dipole in uniform electrical field we get $U = -pE \cos \theta$. And my textbook tells me that the when the dipole is kept ...
0
votes
1
answer
155
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Does electric current flow from higher potential to lower potential or from higher potential energy to lower potential energy?
Here, $O$ is a field charge with a $+T$ charge. $A$ and $B$ are test charges with $+T_1$ and $+T_2$ charge, and they are fixed in place. Suppose the points at which $A$ and $B$ are situated are $P_1$ ...
- 1,018
0
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1
answer
213
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Electric Potential, Work, Potential Energy, and Electric Field [closed]
I don't quite understand these concepts. What is the relationship of electric potential with work, potential energy, and electric field?
0
votes
2
answers
66
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Question about the sign of $\mathbf{E}\cdot d\mathbf{l}$ when computing the Electric Potential [duplicate]
I have a question on the derivation of the electric potential for a single charge located at the origin.
The electric potential is defined as $$V\left(\mathbf{r}\right)=-\int_{\mathcal{O}}^{\mathbf{r}}...
- 313
0
votes
1
answer
40
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Confusion concerning notion and origin of electrostatic potential
An elementary circulation is mathematically defined by: $dC$=$\overrightarrow{OM}$.$\overrightarrow{X}$.
Now, we aplly this to a ponctual charge: $dC$=$\overrightarrow{OM}$.$\overrightarrow{E}$
And we ...
- 3
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1
answer
53
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Why is the work through the element the same as the potential difference if we define potential difference this way?(lumped elements)
In the Feynman Lectures on Physics part ||, chapter 22-3 he defines potential differnce like this:
The picture is an element in a curicuit, the black lines on top and the bottom are the conductors, ...
- 199
1
vote
1
answer
326
views
Electric potential and field lines
I have learned that electric field lines goes from higher potential to lower potential. First of all, how does this happen?
And if the above is the case then suppose I have two uniformly positively ...
- 489
1
vote
2
answers
105
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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
4
votes
2
answers
132
views
Is there a symmetry between scalar and vector formulas for electrostatic and gravitational potential, potential energy, field and force?
Formulas for electrostatic potential, potential energy, field and force, bearing the subscript 'E':
Electrostatic potential $V_E=\frac{U_E}{q}$
Electrostatic potential energy $U_E=k\frac{q_1\,q_2}{r}...
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