Electronics Handbook/Components/Resistors/Parallel Connection

Resistor in parallel

Two or more resistor can be connected in parallel to decrease the total resistance.

${\frac {1}{R_{eq}}}={\frac {1}{R_{1}}}+{\frac {1}{R_{2}}}+...+{\frac {1}{R_{n}}}\,$

Two equal value Resistor in parallel

When connecting two resistors of the same resistance the total resistance is halved

${\frac {1}{R_{t}}}={\frac {1}{R}}+{\frac {1}{R}}={\frac {R}{2}}$