P4.2 circuit symbols Flashcards
1
Q
Bulb
A
Emits light when current flows through it (indicator)
2
Q
Switch (open/closed)
A
Enables you you to break or complete a circuit (turn on or off)
3
Q
Cell
A
Pushes the electrons around a complete circuit
4
Q
Battery
A
A collection of cells
5
Q
Fixed resistor
A
Limits the current in a circuit
6
Q
Variable resistor
A
Allows the current in a circuit to be caried
7
Q
Thermistor
A
Allows the current depending on the temperature
8
Q
Fuse
A
Designed to melt and break the circuit if the current is too great
9
Q
Diode
A
Allows the current through in only 1 direction
10
Q
Light-emitting diode (LED)
A
Emits light when a current passes through it
11
Q
Voltmeter
A
Measures the electric potential difference (voltage)
12
Q
Ammeter
A
Measures the electric current (amps)
