Recent content by jalebi

In a PN junction under reverse bias, a small bit of current exists due to the movement of minority carriers. Under equilbrium, no current passes through. Am I right in thinking that the movement of minority carriers under equilibrium is canceled by the little bit of majority carriers that passes...

Ah okay, so the wavefunction squared is the actual probability. I suppose it's probably best to just consider electron = wave function. The only problem I have with that is that sometimes you have to stop considering electron = wave function and go back to electron = particle (e.g...

Hi guys, I have a question regarding electron wave functions. If an electron's wave function describes the probability of it being at a specific position, how can two wave functions destructively interfere (as occurs in the formation of anti-bonding atomic orbitals)? I can understand how the...

thanks again Dadface. you've been too much of help. thanks to the rest of you guys as well - what a helpful forum this is

I used plastic because i was investigating different dielectrics. I was not designing an optimized capacitor - just carrying out an experiment to learn something. thanks for all the help uart. i don't mean to sound rude or unappreciative, but neither of you has answered my question on the...

anyone?

guys, I have some more questions. these are not really to do with capacitors but with the dielectrics I used. 1) with regards to the type of "film transparencies" used with projectors (e.g. http://content.etilize.com/Large/10639757.jpg), are they polythene or acetate? 2) Is cling film (aka...

Thanks, Dadface. Something rough is better than nothing, i guess.

Thanks guys. Dadface, that's exactly what I've done. however, i only measured the initial voltage of discharge and the time taken to fully discharge (at least up to the limit of my voltmeter). Since, I am working under a time limit, I don't really have time to repeat experiments. Is it possible...

Can't I have one non-zero point, and assume the other point is 0.01V at y seconds. would that work? is there no other way to calculate capacitance

Excuse my ignorance/lack of knowledge, but are you saying that with the data i collected, there is no way to calculate the experimental capacitance?

Yeah, so if I know the voltage was X at t=0 and 0 at t=y, would that be enough? i.e. at one point voltage is x and time is zero, at the other point voltage is 0 time is y.

I have the input voltage, the maximium discharge voltage, and the time it took to discharge. What can I figure out with these (is it enough to calculate experimental capacitance)? I know how to calculate theoretical capacitance using the dielectric constant, but i want to find the...

Thanks a lot born2bwire I have another question, though. Using that voltage, could i find out how much energy was stored? What else could I calculate with that data? Thank you

Thanks. yeah, the ammeter was a part of the circuit the first time around. But i got 1.5 microamps using a switch (i.e. ammeter was not connected to supply). Could you explain the voltmeter part again? would i use a switch or not?