The capacitance tag has no wiki summary.
2
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1answer
424 views
How is capacitance defined for three concentric spheres?
If we have a configuration of metal concentric spheres (each of negligible thickness) of radii $r_1,r_2,r_3$ respectively and $r_1<r_2<r_3$, and we are given the potentials of the spheres to be ...
0
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3answers
1k views
Electric field at a point inside a capacitor
Let's say I have a parallel plate capacitor.
How would I find the electric field at a certain point INSIDE the capacitor (inside the dielectric let's say). From what I understand, the flux of the ...
2
votes
4answers
717 views
How does instant charging of one plate affect the potential of the other plate of a floating capacitor?
If I have an uncharged floating capacitor and I instantaneously connect one plate to some potential, then that plate will acquire some charge. In practice, the other floating plate will ...
2
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2answers
125 views
Determining the capacitance of a system with a non-homogenous dielectric
In an experiment we were given non-homogenous dielectric substances described by functions of coordinate. How can capacitance be determined from this?
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2answers
494 views
how can I find the potential created by spherical capacitor with dielectric material
If we have a spherical capacitor with inner radius or r1 and outer radius of r2, with charges (+/-)q on them and there is a dielectric material (with constant e) in between them with.
What kind of a ...
1
vote
1answer
274 views
Calculating Systematic Error for capacitor charge time constat
I need to calculate systematic error for $\tau$ in capacitor's charging formula( $V_c(t)=V_s(1-e^{-t\over\tau})$ )
I converted it to : $\tau=-{t \over ln(1-{V_c \over V_s})}$
and continued by doing: ...
7
votes
2answers
451 views
Capacitance of Non-concentric Spheres
We all know how to obtain the capacitance $C=\frac{ab}{b-a}$ (ignoring constants) for two concentric spheres of radii $a,b$.
I was just thinking to myself, what would happen to the capacitance for ...
0
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2answers
140 views
Can hair be used as an dielectric?
I was letting my mind freewheel, and it occurred to me that hair, containing keratin, is a polymer. It is also capable of acquiring and maintaining a charge as happens, on occasion, when brushed.
So ...
4
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2answers
370 views
How feasible is it to use the dielectric constant of a liquid to determine specific gravity?
I homebrew my own beer and I'm looking for way to cheaply monitor the specific gravity of my brew during the fermentation process. I came across this thread that seems to indicate capacitance may be ...
3
votes
1answer
137 views
Capacitance of two cocentric spheres, contradicting results
Suppose we are given two conducting, cocentric spheres of radius $a_1$ and $a_2$ respectively. The inner sphere with charge $q$, the outer sphere with charge $-q$.
I can calculate the capacitance of ...
