This has got me really stumped. I've started out with an equation for the differential of a 2x2 matrix:
\frac{d[N]}{dz} = f(z)[E][D] - \{[W],[N]\} - c\sigma_1[N] - d\sigma_2[N]
where all terms in [] are matrices, {} denotes anti-commutator, and the \sigma's are the Pauli matrices...
Thanks, I think I did come across that site, but the trouble is it'd be a whole lot of effort to explain a whole lot more than I need really - I couldn't go to that much detail in my essay, and I don't have the time right now (stupid idea having coursework during exam week anyway) to learn it...
H-H'mmm...
Well, thanks for the reponses. Deadline was just now, in the end I really just had to make do & hope for the best, I'll ask one of the professors later, just as soon as i can track one down. :grumpy: Who knows, may have all been some experimental glitch.
... You increase.. what? By applying a forward bias potential to turn the diode "on", you physically increase the size of the depletion zone...? By annihilating more e/h pairs, maybe you would produce more ions in the depletion zone to increase the opposing voltage across it, but surely the...
:uhh:I fear this is getting a bit above my level. (I also don't quite see what a Zener diode has to do with it, just an example of diode-specific effects?) If it's a diode-type specific effect then hopefully I won't be marked down for not knowing why it happens.
The experiment was performed on eight different diodes, but based on what I've been told of pn junctions the effect should be the same, though of different magnitudes. The observations were actually made on a photodiode, since it was the only one which showed a large enough response to be...
Firstly, E1 = kq/r^2 gives you the magnitude of the electric field, not the force, so will be in N/C, not N. You'll also want to use the true value of q, not it's magnitude, since you need a direction as well. Assuming the point P is where you're measuring the field, and is at the locus of the...
[SOLVED] urgent: effect of light on IV characteristic of pn junctions
^ ^;; Last resort time, needs to be answered by 4pm today. (18/01/08)
It's a pretty qualitative question, and if possible I'd like a qualitative answer. The reason for this is that this is only a weekly experiment I've...