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Hey guys, was wondering if anyone know a mathematical model to model spectural power distribution curves? I know if it's a black body there'd be plank's equations, but what if it's not?

just another quick question, does the internal resistance of a battery change as the voltage or current of the source is changed? Or is it always the same?

thanks @JohnRennie for the answer

Hey guys, quick question here: If R is proportional to L/A, does that mean R is proportional to L and it is also proportional to 1/A?

E=hc/λ doesn't account for the UV dip as well does it?

But are the results similar?

If E=hc/λ, which means as the energy increases, the wavelength decreases, then isn't that essentially the same as the Rayleigh-Jean Law?

Hey, was wondering if anyone could help me with a quick question?

Thanks for helping!

And the R2 drop = R3 +R4 +R5+R6 drop?

@JohnRennie Therefore the R1+R2 drop = the R1 +R3 +R4 drop = R1 + R3 + R5 +R6 drop?

Hey @JohnRennie , was wondering for this question (Q2): indiabix.com/electronics/series-parallel-circuits/… Is it correct if I say that the voltage drop from R1 to R2 = voltage drop from R3 to R4 = voltage drop from R4 + R5 +R6?

Thankyou!

That's okay:) Do you mind if I ask you a few more questions later on if I need a little assistance again? You're very good at explaining! :)

Do you know any websites or anything that has these complex circuit questions and also wheatstone bridge circuit questions?

Have my exam tomorrow and I'm just trying to find hard questions to do to challenge myself.

Ahhh ok ok I think I can see it clearly now. Sorry I was taking my time to comprehend all this haha as I understood it wrong before.

If "voltage drop across branches are the same"

Also, is the voltage drop from G to H to D to C the same as from F to G to C to B?

Yep, thanks for the advice

Alright I'm trying to get my head around this whole concept. So (from the original diagram): after current leaves F, it goes to G, then splits, and all goes back through R4, then goes back to the battery? Could I do this question without re-drawing the circuit? I get the re-drawn circuit but i find it a bit hard to do!

R7 and R6 combined I meant

Ah I see, that looks a lot better. So the voltage drop across BF is the same as the drop across the entire combination on the right? and the drop across R5 is the same as R7 and R6?

Thankyou!

Basically my biggest question is: which nodes in the circuit have the same voltage drop?

Thanks! I'm not sure how I could send the picture, but could I post the link here?

Hey guys, is anyone here free to help me with a question?