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Two heating elements of 70 ohms and 30 ohms are connected in parallel The total resistance of this circuit would be?


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June 05, 2007 10:36PM

To solve for resistors in parallel take the inverse of the sum of the inverses of all the resistors: 1/((1/r1) + (1/r2) + (1/r3)...)
[Google this. It is a lot easier to understand when the proper notation can be drawn.] SO: Rt = 1/((1/70) + (1/30)) = 21ohms