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  1. #1
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    Solving electrical circuit - loop method.

    Hello everyone,

    I've been trying to solve this circuit :

    Click image for larger version. 

Name:	zad111.jpg 
Views:	23 
Size:	133.3 KB 
ID:	148604


    Just to be clear -the single circle with arrow means voltage source,
    - double circle with arrow means current source (I wrote it here because i know that there are some differencies in some countries etc.)

    I have to use loop method. My question is : Is it good way, to connect in parralel to current source I, another current source in opposite polarisation with the same value, so it means that I will "get rid off" lonely current source to use loop method ? Of course , I add the same current source to resistors Z1 and Z5 to not damage the circuit.

    I upload some calculations about this circuit, is it correct ?

    Click image for larger version. 

Name:	WP_20180809_20_54_51_Pro.jpg 
Views:	18 
Size:	504.0 KB 
ID:	148603
    Click image for larger version. 

Name:	2222222.jpg 
Views:	14 
Size:	504.7 KB 
ID:	148606

    Best regards

    Peter

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  2. #2
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    Re: Solving electrical circuit - loop method.

    I was thinking that, to conceptualize it visually it might help if you reverse the positions of Z2 and the voltage source. Then the two power supplies are seen as a stack in series.

    The resistor loads are various series and parallel networks. By redrawing the circuit it might be easier to grasp how they interact. It might reveal a path to simplifying things.

    This is not meant to detract from your own approach, of course.



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  3. #3
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    Re: Solving electrical circuit - loop method.

    Quote Originally Posted by piotrekn95 View Post
    Hello everyone,

    I've been trying to solve this circuit :

    Click image for larger version. 

Name:	zad111.jpg 
Views:	23 
Size:	133.3 KB 
ID:	148604


    Just to be clear -the single circle with arrow means voltage source,
    - double circle with arrow means current source (I wrote it here because i know that there are some differencies in some countries etc.)

    I have to use loop method. My question is : Is it good way, to connect in parralel to current source I, another current source in opposite polarisation with the same value, so it means that I will "get rid off" lonely current source to use loop method ? Of course , I add the same current source to resistors Z1 and Z5 to not damage the circuit.

    I upload some calculations about this circuit, is it correct ?

    Click image for larger version. 

Name:	WP_20180809_20_54_51_Pro.jpg 
Views:	18 
Size:	504.0 KB 
ID:	148603
    Click image for larger version. 

Name:	2222222.jpg 
Views:	14 
Size:	504.7 KB 
ID:	148606

    Best regards

    Peter
    This is a straight forward calculation, why make it complicated? You have three loops in this circuit. The current in the southwest loop is already given as "J". That leaves two loops with unknown currents. Solving the unknowns i1 and i2 for the north loop and southeast loop respectively gives the solution as shown below.

    Click image for larger version. 

Name:	piotrekn95.JPG 
Views:	23 
Size:	42.9 KB 
ID:	148637

    Ratch
    Hopelessly Pedantic


    1 members found this post helpful.

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  4. #4
    Junior Member level 3
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    Re: Solving electrical circuit - loop method.

    You were totally right !

    I used your advices and solved:

    Click image for larger version. 

Name:	11111.jpg 
Views:	8 
Size:	73.4 KB 
ID:	148660

    Thanks,

    Regards
    Peter



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