Circuit diagram symbols

An electric current requires a complete path (or circuit) before it can flow. Some of the symbols used to represent various parts of a circuit in a circuit diagram are shown below.


Cell
Cell

Battery
Battery

Switch
Switch

Connecting wire
Connecting wire

Wires joined
Wires joined

Wires crossing
Wires crossing

Earth connection
Earth connection

Lamp
Lamp

Ammeter
Ammeter

Voltmeter
Voltmeter

"Ground" or "Common"
"Ground" or "Common"