# Total resistance

1. Dec 11, 2007

### physicsed

1. The problem statement, all variables and given/known data

https://www.physicsforums.com/attachment.php?attachmentid=11955&stc=1&d=1197437955

Find the equivalent resistance between points A and B shown in the link above

2. Relevant equations

for parallel, equivalent resistance is =1/R1 +1/R2 +1/R3.....
equivavalent resistance for series is = R1 + R2 + R3

3. The attempt at a solution

i belive they are all parallel or R3, R4, R5, and R6 are series becouse they depend on each other

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2. Dec 12, 2007

### physicsed

1/R= 1/1.5 + 1/2.5 + 1/4.3 +1/3.3 + 1/8.1 +1/6.3 =1.88
r=.53 ohm. this is not correct. the back of my book says .838 and can someone tell me how they got that answer

3. Dec 12, 2007

### marcusl

First find the parallel resistance of R3, R4 and R5, call it maybe R'. Now you see that R1, R2 and the series combination (R'+R6) are in parallel. That will give you the answer.

4. May 25, 2009

### AROD

when can you say that the voltage in the loop will be zero? not in this case?

5. May 25, 2009

### Redbelly98

Staff Emeritus
The voltage around any loop is zero, but that is not needed here. This problem can be solved using series and parallel rules for combining resistors.