Posted by **Jeni** on Wednesday, October 17, 2007 at 11:40pm.

What is the rule for combining resistors in series and parallel circuits( combination circuits)?

- Science -
**drwls**, Thursday, October 18, 2007 at 12:28am
In series, you add the values of the individual resistors. In a parallel circuit of R1, R2, R3..., the equivalent resistance R is given by

1/R = 1/R1 + 1/R2 + 1/R3 + ...

Use as meny terms as there are resistors.

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