All Questions
Tagged with electromagnetism capacitance
241
questions
15
votes
5
answers
2k
views
Where's the energy in a boosted capacitor?
Suppose I look at a parallel plate capacitor in its rest frame and calculate the electrostatic energy, $E$.
Next, I look at the same capacitor in a primed frame boosted in the direction perpendicular ...
- 53.2k
1
vote
1
answer
132
views
Magnetic force on capacitor
I have this problem: I have a capacitor formed by two parallel square-shaped plates, of side $a$, and with distance $d$ between them. They're asking me out of other things, the magnetic force as a ...
- 1,433
1
vote
2
answers
1k
views
Is it possible to charge a capacitor to any potential? Does it depend on the dielectric placed between them?
Is it possible to charge a capacitor to any potential? Does it depend on the dielectric placed between them? Or, are there other factors affecting it?
1
vote
1
answer
9k
views
Capacitance per unit area and CMOS case
In a modern 0.35 μm CMOS processor the gate oxide thickness is around 80 Å = 8 nm. This gives us a capacitance per unit area of $430~\mathrm{nF/cm^2}$
I am not getting how one gets this capacitance ...
- 685
1
vote
2
answers
1k
views
Will I recieve a shock if I charged a capacitor, then I touch the 2 poles in same time?
What happens if I charged a capacitor, then I touch the 2 poles in same time?
0
votes
1
answer
134
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Can we transfer the charge on a plate of a capacitor elsewhere?
I know it is hard , but can we transfer the charge on a capacitor plate elsewhere?
2
votes
2
answers
4k
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Poynting vector of a wire between capacitors
A capacitor made of two circular plates of radius $L$ separated by $d$, initially the plates carry $\pm$ Q charge.
Then a wire of resistance R is placed between them, how do I go about deriving a ...
user15941
2
votes
1
answer
2k
views
Calculating capacitance of integral PCB components
I posted this question originally with Electrical Engineering Stack Exchange but nobody seems to know the answer. So I thought a physicist might find the question more approachable.
Formulas for ...
- 205
22
votes
5
answers
57k
views
What is the difference between a battery and a charged capacitor?
What is the difference between a battery and a charged capacitor?
I can see lot of similarities between capacitor and battery. In both these charges are separated and When not connected in a circuit ...
- 7,335
19
votes
4
answers
2k
views
Distorted colors of Google StreetView photographs near electric power lines
This is a followup to my question:
Cyclist's electrical tingling under power lines
Some users presented a convincing picture that the electric shocks under power lines are primarily from the ...
- 180k
2
votes
3
answers
15k
views
How can I theoretically describe the potential between two capacitors in series?
Suppose to have two capacitors in series:
The voltage in the middle point will be:
$$
V_X = V_1 \frac{C_1}{C_1+C_2}
$$
How can this be explained? It's been asked in electronics, and explained in ...
- 195
0
votes
1
answer
2k
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Potential difference between conductors
Reading some books there is something that i don't understand. Is the capacitors topics when they name a potential difference between conductors.
As i know, Potential difference is the difference in ...
- 111
0
votes
2
answers
328
views
Is it true that capacitors closer to a power source charges quicker and gets priority?
Let's say I hook two capacitor in a parallel circuit with a voltage source. Would the capacitor closer to the battery be charged up first? Because when the voltage excites and draws electrons from the ...
- 937
1
vote
1
answer
2k
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How do home-made capacitator bottles affect a tesla coil?
In the tutorial I'm following, the guy uses 6 snapple bottles to make capaciter (by covering them with foil and filling them with salt water) for a 9kV 30mA input. I have a stronger transformer (15kV ...
- 163
0
votes
3
answers
4k
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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 ...
- 1,269