Circuit Diagrams and Basic Symbols
Reading circuit drawings
Why diagrams matter
Circuit diagrams use standardized symbols so people can discuss and build circuits without drawing every object exactly as it looks.
Common symbols
Series connections
In a series circuit, components are connected along one path, so the same current passes through each component.
Parallel connections
In a parallel circuit, branches provide multiple paths for current, so each branch can behave differently.
Reading tip
Trace the path from the power source through each component and back again. If there is a break, the circuit is open.
What does a switch do in a circuit?
A switch controls whether current can flow.
Correct answer: Opens or closes the path for current
In a series circuit, does current have one path or many paths?
Series circuits have a single path for current.
Correct answer: one path
Series vs parallel
Series
- One path for current
- Same current through each component
Parallel
- Multiple paths for current
- Branches can work independently