Electronics Handbook/Components/Resistors/Parallel Connection

Resistor in parallel
Two or more resistor can be connected in parallel to decrease the total resistance.
 * [[Image:Resistors_in_Parallel.svg|200px]]
 * $$\frac{1}{R_{eq}} = \frac{1}{R_1} + \frac{1}{R_2} + ...+ \frac{1}{R_n} \,$$

Two equal value Resistor in parallel
When connecting two resistors of the same resistance the total resistance is halved
 * $$\frac{1}{R_t} = \frac{1}{R} + \frac{1}{R} = \frac{R}{2}$$