Current Electricity

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  • Created by: sophie
  • Created on: 22-11-10 21:23

Electric Circuits:

  • Circuits are a good way of showing the different components in an appliance.
  • Each component has its own symbol and you must know the difference between them all and what they are.
  • A battery consists of two or more cells connected together.


  • Resistance (ohms) = potential difference (volts) / current (amperes)
  • The current through a resistor at constant temperature is directly proportional to the potential difference across the resistor.
  • The ammeter measures the current through an appliance. It is connected in series with the lamp so the current through them is the same.
  • The voltmeter measures the potential difference across an appliance. It is connected in parallel so it measures the p.d across it.
  • Electrons passing through an appliance


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