Physics Paper 1

• Electrical work done example


  • Energy required to overcome resistance in wires of a circuit
• Nuclear fuels


  • Non-renewable
  • Radioactive waste (needs to be disposed of safely)
• Biofuels


  • Renewable
  • 'Carbon neutral', so low impact
• Wind


  • Renewable
  • Takes up large areas that could be used for farming
  • Some people say windmills spoil the view
• Hydroelectricity


  • Renewable
  • Local habitats are affected by the large areas that need to be flooded to build dams
• Geothermal


  • Renewable
  • Low impact
• Tides


  • Renewable
  • Tidal barrages can block sewage which needs to go out to sea
• Sun


  • Renewable
  • Low impact
• Water waves


  • Renewable
  • Low impact
• Charge is a property of a body which experiences a force in an electric field. Charge is measured in coulombs (C).
• The potential difference (or voltage) of a supply is a measure of the energy given to the charge carriers in a circuit. Units = volts (V). This is the voltage between two points that makes an electric current flow between them.