# Series and Parallel Circuits Resistance Total Mnemonic

A series circuit of resistances, like a light bulb, are connected in line with each other.

The total resistance is easy to remember.

R_{Total}=R_1+R_2

**Total Resistance = Resistance 1 + Resistance 2**

But what about when they are parallel?

Use the mnemonic or aid below to remind you that you are dealing with something parallel, similar to the parallel bars in gymnastics.

**Parallel = Parallel Bars**

Which looks like this from the side:

But think of the man being a number 1 instead.

Use this image to put parallel bars in the formula for resistance. Instead of

**R_{Total}=R_1+R_2**

Now put them as parallel resistance and add parallel bars.

Summary

1/ Resistance in series

**\text{Total Resistance in series}\text{ }=R_1+R_2**

2/ Resistance in parallel

**\frac{1}{\text{Total Resistance in Parallel}}=\frac{1}{R_1}+\frac{1}{R_2}**