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4679945
GCSE AQA Physics 2 Circuits
Descripción
A mind map showing information about circuit symbols & devices, series & parallel circuits and some formulas.
Sin etiquetas
gcse
aqa
physics
physics unit 2
circuits
science
physics
physics 2
gcse
Mapa Mental por
Lilac Potato
, actualizado hace más de 1 año
Más
Menos
Creado por
Lilac Potato
hace más de 8 años
341
45
1
Resumen del Recurso
GCSE AQA Physics 2 Circuits
Current, resistance potential difference
Current - flow of electric charge around the circuit, units: amps
Ammeter - in series
Potential difference - driving force that pushes the current round, units: volts
Voltmeter - in parallel
Resistance: anything which slows the flow down, units: ohms
Increases with temp. - ions in conductor move more, can't flow easily
The greater the resistance, the smaller the current
Current = Charge (C) / Time (s)
Charge is measured in coulombs
Potential difference = Work done (J) / Charge (C)
Circuit Symbols
Cell
Battery
Open switch
Closed switch
Lamp
Fuse
LED
Resistor
Variable Resistor
Ammeter
Voltmeter
Diode
LDR
Thermistor
Potential difference-current graphs
Resistor - current is directly proportional to PD
Filament lamp - as temp. increases, resistance increases
Diode - current will only flow in one direction, high resistance in opposite
V = IR
Circuit devices
LED - emits light when flowing in forward direction
LDR - LURD (Light Up, Resistance Down)
Thermistor - TURD (Temp. Up, Resistance Down)
Series Circuits
Remove 1 component - broken
PD is shared
Current is the same
Resistance adds up
Cell voltages add up
Parallel Circuits
Each component separately connected
Removing - won't affect
PD is the same
Current is shared
Recursos multimedia adjuntos
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c7769529-1184-4c23-ae03-5e159e5c3131.gif (image/gif)
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