Resistor Series and Parallel

Resistors in Series

When resistors are connected in series with each other, the total resistance is equal to all of the values added together.

An example:

Resistors in Parallel

When resistors are connected in parallel with each other, the total resistance is calculated using the fomula below.

An example

Resistors in Parallel method 2

The parallel formula just seen works with any number of resistors connected in parallel. An easier method can be used when only two resistors are involved.