1. Circuit Diagrams
13.1
An electric circuit can be represented using a diagram.
Each part of the circuit is represented with a symbol.
By reading a circuit diagram, it is possible to determine how the circuit works and how to repair it when it does not function properly.
circuit diagram

2. Series Circuits
13.1
In a series circuit, electrons flow through only one path.
Loads are connected in a chain, one after another in one continuous loop.
When one load does not work, the whole chain of loads stops working because electrons cannot flow.
series circuit

3. Parallel Circuits
13.1
In a parallel circuit, electrons can flow through more than one path.
Loads are connected in different branches that are connected to the energy source.
When a load does not work in one branch, the loads in the other branches continue to function because electrons can flow through another path.
parallel circuit