Electricity IGCSE Combined Sciences Study Notes

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-The current displays how many coulombs flow every second

-Ammeters measure the flow of current, and can be placed anywhere in the circuit. Measured in amps A

-The sum of potential differences (voltage) of circuit components makes the potential difference across the power supply of circuit components. Measured in volts V

-Voltmeters measure the potential difference and are placed at either end of the cell/component

- Power = Voltage x Current

- Resistance = Voltage/Current

- In a series circuit…

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