Capacitors Definition and 868 Threads

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...