# Help calculating req in parallel circuit and voltage through node

Discussion in 'Homework Help' started by fishguts, Sep 13, 2007.

1. ### fishguts Thread Starter Member

Sep 3, 2007
22
0
I am trying to calculate the rew of a paralle circuit but cannot get the right answer.

The resistance of them each is 100ohms and 383.1944444 ohms or 27590/72.

I tried the formula 1/R1+1/R2 but I am not getting the right answer. Can anyone point me in the right direction please? Also how do i calculate voltage at each node? I am not too familiar with that and I goggled around and did not find anything helpful. I am trying to find voltage through each node in this circuit . it is problem number 1d. Any help would be appreciated.

http://www.ee.nmt.edu/~tubesing/ee10...3lab/3lab.html

2. ### Eduard Munteanu Active Member

Sep 1, 2007
86
0
The link you posted is broken.

Are you sure you got the formula right? It's:
${1 \over R_{eq}} = {1 \over R_1} + {1 \over R_2} + ...$
which yields $R_{eq} = {{R_1 R_2} \over {R_1 + R_2}}$ for two resistors. Maybe you forgot about that the left side of the first equation is a fraction.