point 1 and 4 turn off, asked is the value of Ra and Uqa in a transferred electrical circuit as well as Rb Uqb, value R1abcd.. is 1 Ohm with no matter what letter behind, same as R2abcd..... is 2 Ohm. I have answers, and I tried to solve it out but I cannot get them correctly. Ra is 0,75 Ohm, Uqa is equal to 0.25 Uq. Anyone can do some helps. Appreciate it so much! Wanna see the process so that I could understand it totally.

 

So show us your answers! We need to see your approach to the problem, so as to show you where you went wrong.

This is the “Homework Help” forum. Note that it’s not the “Homework Done for You” forum.

 

So show us your answers! We need to see your approach to the problem, so as to show you where you went wrong.

This is the “Homework Help” forum. Note that it’s not the “Homework Done for You” forum.

R2ab= R2a//R2b = 1 Ohm, R2ab//R3 = 0,75 Ohm. UqA no idea how it goes to be 0.25 Uq. Show us your answer, thanks so much!

 

So show us your answers! We need to see your approach to the problem, so as to show you where you went wrong.

This is the “Homework Help” forum. Note that it’s not the “Homework Done for You” forum.

Basically this is my answer to the first question. I might be able to get the right answer, but I am not so sure about it. For example, if I do the parallel connection firstly from left side and then parallel to right, the outcome ist different to the right answer 0,75. Somehow it looks like only R3 is parallel to the whole net as well, which means if I do parallel R2a and R3 then, it seems like its a series connection to the R2b, either I do parallel to the right resistance or make series connection to it, the result is not right to the answer. I wanna know why?Let's say if in the way I did which I got the right answer of total Resistance 0,75 Ohm, then I used the both equation of Ia to find Uqa as you can see in my uploaded jpeg file, from the left drawing I took Uq/R3 to get Ia, but I don't know why. If I wanna get the current from point 1 to 4, it shouldn't be like Uq/(R2a+R3)? I might be not so clear with the Thevenin´s theorem. Just getting confused again and again.

 

Hi,

I think you might want to be a little more descriptive. "point 1 and 4 turn off" what does that mean exactly?

When you have a more complicated network either you find shortcuts like using Thevenin/Norton equivalents and lumping circuit elements or you apply a general circuit analysis technique like Nodal Analysis. This network does not look planar so you probably cant use Mesh Analysis
though in accordance with theory.