All Questions
11
questions
1
vote
1
answer
614
views
Redistribution of charge spherical capacitor
In a spherical capacitor, we have two concentric spherical shells, the inner one carrying a charge $Q$ and the outer one carrying charge $-Q$. If the inner shell is displaced from the center without ...
- 55
0
votes
2
answers
156
views
Energy stored in a Capacitor with dielectric [closed]
We have a parallel plate capicitor with capacitance C ($ C= \epsilon°A/d $) when no dielectric is inside it.
The charge on it is Q(+Q on left and -Q on right).
Now a dielectric slab of dielecteic ...
1
vote
1
answer
968
views
Change in potential energy of a parallel plate capacitor as a dielectric slab is moved in the space between plates
I was doing this question:
If a parallel plate capacitor made of square plates of side L and separation D is connected to voltage source V.
And then a dielectric slab of width D is introduced ...
- 243
0
votes
2
answers
353
views
How Do I Calculate the Potential of System?
I was doing my homework when I came across this question:
Three equal point charges, each with charge $1.40 \, \rm\mu C$ , are placed at the vertices of an equilateral triangle whose sides are of ...
- 101
5
votes
3
answers
7k
views
Electric Potential Energy of a charged conductor
My physics textbook asks (I translate):
A sphere of copper with a radius of 0.72 metres is charged with a Potential of 270,000 Volt. Find its charge and the electric energy it holds.
I found the ...
- 559
1
vote
0
answers
474
views
Potential energy on a spherical capacitor
I have been having some trouble understanding the storage of energy
inside a spherical capacitor composed of two concentric spherical
shells where the inside shell has radius $a$ and charge $2q$, ...
- 637
0
votes
1
answer
92
views
What is the distance in between two shells of a spherical capacitor?
I am studying Capacitance for my Physics class. We have been working with parallel-plate capacitors, which I understand perfectly. However, I’ve seen some exercises with spherical and cylindrical ...
- 309
0
votes
1
answer
969
views
Energy of a system of conductors
Electrostatic potential and charges on conductors that are closed to each other can be put in relation with the capacitance matrix .
Can the energy of the system of two (or more) conductors be ...
- 2,607
0
votes
0
answers
174
views
Calculating Electrostatic Energy from Capacitance Matrix
Let's say I have two spherical conductors and I put some charge on each. As I understand it, the electrostatic energy $W$ in the fields will be equal to
$$W = \frac{1}{2}C_{11}V_1^2 + \frac{1}{2}C_{22}...
- 962
-1
votes
1
answer
442
views
Final potential difference between plates of capacitor [closed]
If the plates of a parallel plate capacitor are given charges 4Q and -2Q . The capacitor is then connected across an uncharged capacitor of the same capacitance as first one (=C) . Now we have to find ...
- 3
1
vote
2
answers
91
views
Capacitor's voltage
Imagine I have two plates that form a capacitor, so the magnitude of the charge in each plate is, let's say, $Q$. So, the force, in respect to the distance $d$, is gonna be:
$$F(d) = k\frac{Q^2}{d^2}$$...
- 19