AQA GCSE Physics Electricity Trilogy
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40 Terms
Current
The rate of flow of electrical charge
Coulombs
Unit of Charge
Amps
Unit of Current
Current in a series circuit
The same at every point in the circuit
Volts
Unit of Potential Difference
Ohms
Unit of Resistance
Ohmic conductor graph
Filament Lamp graph
Diode graph
Thermistor Graph
LDR graph
Open switch symbol
Closed Switch symbol
Cell symbol
Battery symbol
Diode symbol
Resistor symbol
Variable Resistor symbol
LED symbol
Lamp symbol
Fuse symbol
Voltmeter symbol
Ammeter symbol
Thermistor symbol
LDR symbol
Diode
Current can only flow in one direction
Potential difference
Shared amongst all components in a series circuit
Total resistance
The sum of all resistors in a series circuit
Potential difference
Is the same across each branch in a parallel circuit
Total Current
The sum of all currents through each branch in a parallel circuit
Total resistance
Is less than the value of the lowest resistor in a parallel circuit
230V
Potential difference of mains supply
50Hz
Frequency of mains supply
Live wire
Coloured brown in a plug
Neutral wire
Coloured blue in a plug
Earth wire
Coloured green and yellow in a plug
Watt
Unit of Power
National Grid
A series of cables and transformers linking power stations to consumers
Step-up Transformer
Increases the Potential Difference from the Power station to transmission cables
Step-down Transformer
Decreases the Potential Difference for domestic use
