total resistance

physicsed

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

http://www.physicsforums.com/attachm...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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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

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.

AROD

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

Redbelly98

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.