Elec. Circuits: Circuit Components Flashcards
Cell
Provides circuit with a source of potential difference (energy)
Battery
2 or more cells
Switch
Turns circuit on(closed), or off(open)
Filament Lamp
Emits Light(Non Ohmic)
-As I^ , R^
Temperature of filament ^, metal ions scatter electrons more,
resistance increases
Fixed Resistor
(Ohmic)
Limits flow of current
-Fixed resistance
Variable Resistor
Resistor with a slider
-Changes resistance
(E.g. Volume controls)
Thermistor
(Non-Ohmic)
Temp ^, Resistance v
LDR
(Non Ohmic)
Light ^, Resistance v
Diode
Allows current to flow in only one direction
After a small forward voltage resistance drops quickly
-Reverse Direction resistance is very high
LED
Diode that emits light when current passes
Used for displays
Ammeter
Measures Current
Connected in series
Voltmeter
Measures potential diff. of a component
Connected in parallel with the component