All Questions
7
questions
0
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2
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132
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Gravitational potential and Bessel functions
In electromagnetism, we can solve Laplace and Poisson equation using Bessel functions. But my question is why don't we use Bessel functions to solve these equations for gravitational potential?
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2
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1k
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Comparison of voltage to gravitational potential
I'm on my way understanding what Voltage is, and came across this great video explaining the concept of electrical potential using an analogy to gravitational potential. I'll write what I understood ...
- 282
1
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3
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321
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A question on the Poisson field equations in classical gravity and EM
I'm having a problem understanding why in the Poisson equation for gravitational potential, the term with the mass density has a positive sign, while for the electric potential, the charge density has ...
- 158
5
votes
2
answers
629
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Why we can use the divergence theorem for electric/gravitational fields if they have singular point?
If we were to calculate the surface flux of the total field, we would only require the vector field to be continuous on the boundary. But in order to replace the surface integral by a volume integral ...
- 125
1
vote
2
answers
195
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Electric voltage versus gravitational voltage across a unifom field
Let us say we have a uniform electric field, like between two charged plates separated by a distance $d$.
The formula for the voltage between the plates is $\Delta V=Ed$.
But what is the value of ...
- 527
4
votes
2
answers
3k
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Can the electric or gravitational potential be discontinuous? Why?
I was solving the Laplace's equation for the charger thin spherical shell and noticed that the field is discontinuous at the surface (inside it is zero and outside it is proportional to $1/r^2$) but ...
2
votes
1
answer
2k
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A zero gravitational potential and non zero gravitational field
Give an example of a situation in which there is a non-zero gravitational field and a zero gravitational potential at the same point?
$$dV=-\vec E\cdot d\vec r.$$
The above equation implies that ...
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