Electronics & Circuits
Intermediate

Resistors in Parallel

Reciprocals of parallel resistances add.

Formula

1Req=1R1+1R2+⋯\frac{1}{R_{eq}} = \frac{1}{R_1} + \frac{1}{R_2} + \cdots

Variables

R_iIndividual resistances

Example

10∥10 = 5Ω

Did You Know?

Adding a parallel resistor lowers total resistance — more lanes for the current to flow.

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