The capacitance measurements of “Fuel Gauging Tubes” (FGT) that are composed of carbon composite inner and outer tubes shows unacceptable level of variations and I need to reduce the variation of capacitance.
I would like to know what are the contributing factors to capacitance variations...
I have a nasty problem here which I have been working at for a while but keep getting rubbish answers.
I have tried using: E = surface charge density/(dielectric constant * Epsilon0 (8.85*10^-12) but I get a dielectric material which has a lower dielectric constant than air.
I really...
Hi there!
I have great problem in tackling some problems on this topic, I hope you can help me. :confused:
1. For a V-t graph, it has the shape of a sine curve but well beyond the x-axis. It has 3 complete cycle in 6ms as shown in the graph.
Notes: V is the potential difference applied...
hi... I'm very glad if you all can help me solving my problem..i want to know what the uses of capacitors in modern integrated circuit chip..i had searched for it in many books but what i found is the uses of capacitors in usual circuit... so please help me...
thanks
If 26 V is applied across the following network, calculate the voltage across each capacitor:
Ignore the dots, it's just spaces between the two ends
___ 3.00 uF _____ 4.00 uF
|.......|
|.......|
__________2.00 uF______
|.......|
|.......|
|.......|
So I know that for capacitors in...
I'm completely boggled by this problem:
"A 12.0V battery is used to charge a 4.00μF capacitor. A switch is then thrown disconnecting that capacitor from the battery and connecting it to a circuit with two capacitors (3.00uF and 6.00μF) connected in series. What are the final charges on the...
Hi,
I understand generally how to do problems with capacitors, but I am faced here with a problem about 2 capacitors and I am not sure what the appropriate calculations are for combining their capacitance, etc. Here is the problem:
A 7.7 uF capacitor is charged by a 125-V battery and then...
Hello Everybody, How are you?
Could anyone please help me with this Parallel Plate Capacitor Problem, Here is the Question in detail Click on the link for a detailed explanation of the question:
http://online.physics.uiuc.edu/cgi/courses/shell/phys112/summer04/tmau.pl?04/06
This is a...
Hello Everybody, I am new to this site, However I have a quick question about the two spherical capacitors.
Please take a look at this link here:
http://online.physics.uiuc.edu/cgi/courses/shell/phys112/summer04/tmau.pl?04/05
This is a problem about two spherical capacitors and I...
Err, another stupid question,
When the microcontroller chip is connected by 5V DC power supply to input high voltage(Logic 0) for active low input pin, so that when the switch is pressed, a low voltage is input(Logic 1) into the pin, why do we need to connect a capacitor in parallel to the...
Hello All,
I'm a novice when it comes to electronics and I have what I think is a really basic qoestion concerning capacotors. If you have a capacitor and a battery in a circuit so that the battery is set to charge the capacitor, is the capcacitor charged by the voltage potential in the...
How do I find the charge on each capacitor?
-------c1----------------------
|......|...|
|......|...|
V......c2...c3
|_______________|__________|
I know how to find the total charge which would be q=Ceq*v but I don't know how to find the charge on each individual capacitor.
Hey Guys,
I was just doing a question on capacitance and i was wondering since capacitance is usually determined by a fixed formula which is dependent on the di electric material that is contained within a capacitor.. However it struck me that a capacitor does not neccesarily contain...
Can some one please help me with this question:
A 20 microfarrad capacitor is charged to 10V and isolated. A second uncharged 20 microfarrad capacitor is now connected to the plates of the other. The capacitors rapidly come to the same pd between their plates. What is the charge on each...
1. For http://www.pen.eiu.edu/~cuemc4/circuit.bmp picture.. Calculate the potential at point D.
2. I 15-V battery is connected to three capacitors in series. The capacitors have the following capacitances: 4.5microFarads, 12.0microFarads, and 32microFarads. Find the voltage across the...
Here's the question.
The drawing (attached) shows an electron entering the lower left side of a parallel plate capacitor and exiting at the upper right side. The inital speed of the electron is 7.00x 10^6m/s. The capacitor is 2.00cm long, and its plates are separated by 0.150cm. Assume that...
A small plastic ball of mass 6.95×10-3 kg and charge +0.11 mC is suspended from an insulating thread and hangs between the plates of a capacitor. The ball is in equilibrium, with the thread making an angle of 30.0° with respect to the vertical. The area of each plate is 0.0152 m2. What is the...
What do the strange values on disc capacitors signify exa 005 and
5D 1KV , why can't they just be abbreviated in a more intuative way like for exa just 10 micro farads ?
Also for a small mic how can I tell apart which ends which + or 1 and what do the letters HAI signify on some...
I have think for this question very hard but still I cannot get the correct answer.I need somebody to help me figure out how the capacitors in the diagram are arranged.
I hope that someone will reply me back as soon as possible.I have my question and diagram in the attachment followed.Thanks...
really, what's the difference between a capacitor and a battery? and on a circuit diagram, do capacitors have current induced to keep a current? I've only taken first year physics in high school, and we haven't covered them yet, though when i came across some problems with capacitors...
Hey guys I am a bit stuck as to what to do here... we haven't covered much on RC circuits yet and id like to learn how to do this properly.
Two 6.0µF capacitors, two 2.2 kiloOhm resistors, and a 12 V source are connected in SERIES. Starting from the uncharged state how long does it take for...
(not sure if this belongs here or in the Electrical Engineering section)
Howdy-
Consider a low pass RC filter subjected to an AC source (i.e the "output" is the capacitor voltage).
I understand mathematically how to assess the frequency reponse of such a circuit.
What I am after is...
If i take a 2microF capacitor charged to a p.d. of 50V, and a 3microF capacitor charged to 100V, and connect them in parallel with their positive plates connected,
a) what is the equivalent capacitance of this combintation?
b) what is the p.d. across each capacitor after they are connected...
In a capacitor, after it is charged and then after the switch is open, the voltage and current decreses. How does these decresing quantities affect the voltage across R, and therefore, how do they affect the current in the circuit?
I have a few problems I'm stuck on, I'm not sure what equations to use...please help
1) An electric car accelerates for 6.4 s by drawing energy from its 300-V battery pack. During this time, 1800 C of charge pass through the battery pack. Find the minimum power rating of the car.
2)...
Imagine two capacitors charged at the same voltage.
Now, connect one of them to a high frequency switch, and then to the primary of a 1:100 transformer. On the secondary of this transformer, there is a diode bridge, and then, the second capacitor is connected.
Will the voltage of the...
I need some help with these problems:
1) A parallel-plate vacuum capacitor has 7.36 J of energy stored in it. The separation between the plates is 3.64 mm. If the separation is decreased to 1.40 mm, what is the energy stored if the following events occur?
a) the capacitor is disconnected from...
Capacitor C1 and C2 are connected in parallel and a potential difference is applied to the combination. If the capacitor that is equilvalent to the combination has the same potential difference, then the charge on the equivalent capacitor is the same as?
a) the charge on C1
b) the sum of...
to repair a power supply for a stereo amplifier, an electronics technician needs a 100-uF(microfarads) capacitor capable of withstanding a potential difference of 90V between the plates. the only available supply is a box of five 100-uF (microfarads) capacitors. each having a maximum voltage...
Imagine one plate of a capacitor connected to a terminal of a electric AC source. Imagine the other plate of the capacitor to the right is connected to the other terminal of the source.
From the point of view of classic electronics, a capacitor with such AC signal behaves just like a wire...
I am supposed to design an energy storage system for a car, so I want to calculate how much energy can be stored in a capacitor whose geometry matches the car. As a baseline, we have an area 150 cm wide by 2500 cm long by 30 cm tall. The capacitor is a sandwich geometry , one layer of...
Hello everybody.
Can't surrender so much easy... Take a look to this:
www.geocities.com/k_pullo/suppose.htm
You know the process: tell where do you see the faults, and then i will understand somethings, but new doubts will come to my mind.
Thanks for all your support in physics...
Parametric "amplification" of energy on capacitors
Hello.
My last post was about how geometry affected potential and electric energy transfers. Some people send me interesting information about that, and I've been thinking about parametric power conversion.
We usually relate E to a...