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1. Homework Statement
I know how to deal with resistors/capacitors etc in series and parallell circuits, but when it comes to more complex circuits I have no idea how to treat them, and I cant find any guides or info on it and my physics book doesnt tell anything. All solutions to this kind of problems never explain how to think.
Heres a picture on a "normal" parallell circuit that is easy to understand:
http://sv.wikipedia.org/wiki/Parallellkoppling
What I dont understand, is how to treat more advanced circuits when its not trivial if its parallell or a serie. I give some examples of these kind of problems that I dont understand:
1. (see picture namnlös4)
You have 12 1ohm resistors set up in a cube. What resistance will you get if you measure at the ends over the cubes diagonal?
2. I just cant see how they get the total resistance in this figure (pic circ.jpg)
2. Homework Equations
Serie circuits:
Rtot=R1+R2+...+Rn
parallell circuits:
1/Rtot=1/R1+1/R2+...+1/Rn
3. Given solutions to the problems
1. (see picture sol1)
well I just cant see how they get to that calculation...
2.also see picture circ.jpg
the problem that I dont understand in this one is how the deal with the resistors R3 and R5.
I hope it didnt get too messy. Basically my problem is tips or "formulas" on how to deal with more complex electric circuits.
I know how to deal with resistors/capacitors etc in series and parallell circuits, but when it comes to more complex circuits I have no idea how to treat them, and I cant find any guides or info on it and my physics book doesnt tell anything. All solutions to this kind of problems never explain how to think.
Heres a picture on a "normal" parallell circuit that is easy to understand:
http://sv.wikipedia.org/wiki/Parallellkoppling
What I dont understand, is how to treat more advanced circuits when its not trivial if its parallell or a serie. I give some examples of these kind of problems that I dont understand:
1. (see picture namnlös4)
You have 12 1ohm resistors set up in a cube. What resistance will you get if you measure at the ends over the cubes diagonal?
2. I just cant see how they get the total resistance in this figure (pic circ.jpg)
2. Homework Equations
Serie circuits:
Rtot=R1+R2+...+Rn
parallell circuits:
1/Rtot=1/R1+1/R2+...+1/Rn
3. Given solutions to the problems
1. (see picture sol1)
well I just cant see how they get to that calculation...
2.also see picture circ.jpg
the problem that I dont understand in this one is how the deal with the resistors R3 and R5.
I hope it didnt get too messy. Basically my problem is tips or "formulas" on how to deal with more complex electric circuits.
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