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Finding Resistance

by Aditya3003
Tags: resistance
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Aditya3003
#1
Dec21-12, 11:25 AM
P: 7
1. The problem statement, all variables and given/known data
I need to find to resistance and am having problem as I do not know KCL's. All I know is the total resistance in series or parallel. I have attached the image. Find resistance b/w the 2 ends.


2. Relevant equations
If you have Resnik & Halliday open page 723(Vol2). and see figure 31-41. My question is same with r = 20ohm & R=10ohm.



3. The attempt at a solution
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gneill
#2
Dec21-12, 11:57 AM
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P: 11,689
Quote Quote by Aditya3003 View Post
1. The problem statement, all variables and given/known data
I need to find to resistance and am having problem as I do not know KCL's. All I know is the total resistance in series or parallel. I have attached the image. Find resistance b/w the 2 ends.


2. Relevant equations
If you have Resnik & Halliday open page 723(Vol2). and see figure 31-41. My question is same with r = 20ohm & R=10ohm.
If you don't know the basic circuit laws it's going to be difficult to proceed; All you can do is try to apply "canned" formulas. Hint: Look up "Y-Delta transformation".
mfb
#3
Dec21-12, 12:13 PM
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P: 11,911
One resistor has zero current inside due to symmetry, you can remove it and use your formulas for resistors in series/parallel afterwards.


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