The discussion revolves around calculating the electromotive force (EMF) of a cell within a circuit, specifically focusing on a circuit diagram that includes resistors and internal resistance. Participants are exploring the application of Kirchhoff's laws in this context.
The discussion is active, with participants sharing their interpretations and questioning the assumptions behind their calculations. Some guidance has been offered regarding the need to apply Kirchhoff's laws, but there is no clear consensus on the correct approach or understanding of the concepts involved.
Participants mention specific voltage readings and resistances but express confusion about how these relate to the overall EMF calculation. There is a lack of clarity regarding the definitions and applications of Kirchhoff's voltage law, which is central to the problem at hand.
HINT: You need to apply Kirchoff's rules here.DeanBH said:http://img.photobucket.com/albums/v345/crimsonflames/ddsa.jpg
thats the circuit.
isn't the equation emf = I(R+r)
0.032 * 900?
isn't right and i know it isn't, so i don't know what to do! =(
That equation is valid only for two resistors in series, i.e. where a cell has an internal resistance r and is connected to a load resistance R.DeanBH said:I know I need to find the difference of of the volts about the 2 resistors.
it ends up being 1 volt, but how the hell does i(R+r)=emf come into that
I also have emf = 1V. So what doesn't make sense?DeanBH said:I did, the answer is 1
just doesn't make sense.
What is Kirchoff's voltage/loop law?DeanBH said:Why do i have to count one of those volt readings as negative, and why inst it 1/r it looks like a a parallel
Hootenanny said:What is Kirchoff's voltage/loop law?
Hootenanny said:As I said previously, you need to apply Kirchoff's laws here.
DeanBH said:I did, the answer is 1
Hootenanny said:What is Kirchoff's voltage/loop law?
How can you apply Kirchoff's voltage law if you don't know what it is?DeanBH said:no idea