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Parallel Resistor Calculator (2 resistors)
\(\frac{1}{R_{total}} = \frac{1}{R_1} + \frac{1}{R_2}\)
Instructions:
Select the variable you want to solve for, and fill in the others.
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Symbol
Input Value
Unit
Description
\(R_{total}\)
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\(R_{2}\)
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\(R_{1}\)
-
Calculate
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References
All About Circuits provides a detailed explanation of the parallel resistance formula, deriving rac{1}{R_{eq}} = rac{1}{R_1} + rac{1}{R_2} + dots + rac{1}{R_n} from Ohm's law and simplifying for two resistors as R_{eq} = rac{R_1 imes R_2}{R_1 + R_2}.
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