In electronics, we can find both series and parallel circuits.
A series circuit is a circuit where the components are connected in a consecutive chain. This gives the current only one path to take.
A parallel circuit is a circuit where the components are connected parallel to each other. So the current will flow in several paths.
Often, real circuits have a mix of series and parallel circuits.
Current in Circuits Connected in Series
The current in a series circuit is equal everywhere in the path. The same amount of current flows through all the components. To find the current use Ohm’s law
Resistance in Series Circuits
If you have several resistors connected in series, it’s very easy to find the total resistance. All you have to do is to find the sum of all the resistance values.
Capacitors Connected in Series
This is the formula for calculating capacitance values:
To find CTOTAL you need to flip both sides, and you’ll end up with this:
Calculating resistance and capacitance in a parallel circuit is kind of funny. You just switch the methods from the series circuits =)
To calculate resistances in parallel you use the same method used to calculate capacitors in series. And vice versa.
Current in Parallel Circuits
The current in parallel circuits can be different from path to path. To find the current of a path, you use Ohm’s law.
Calculating Resistors in Parallel
To calculate the resistance in a parallel circuit, you use the following formula
To find RTOTAL you need to invert both sides, and you’ll end up with this:
Calculating Capacitors in Parallel
You calculate the capacitance from capacitors in parallel simply by taking the sum of all the capacitance values.
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