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# Physics Revision

Voltage Pushes the current around the circuit
Current Flow of electricity
Resistance Anything that resists or lowers current
National Grid The system of power stations, cables, pylons and transformers that supply electricity to consumers
Adding components increases ... and lowers the ... Resistance Current
Resistance graphs are... Straight lines
Bulb graphs are... Curved
There is a curve because... As the bulb gets warmer the resistance increases, and the currents begging to level off
The line is straight because... Voltage and current are proportional to each other, the resistance stays constant
Power The rate of using energy
What do step up transformers do? Increases the voltage and decreases the current to decrease the amount of heat energy wasted
What do step down transformers do? They lower the voltage and increase the current to make it safe for consumers
To convert from kV to V you... x1000
To convert form MV to V you... x1000000
Series Circuit Rules Voltage is shared between each component V1=V2+V3 Current is the same at each part of the circuit A1=A2=A3
Parallel Circuit Rules Voltage is the same everywhere Current is split between each branch
Created by: Jewlia123

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