Physics Mains Energy

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Mains Energy

Generating Electricity

  • Electricity is a convenient form of energy that can be generated using different energy sources
  • Some are renewable, some are non-renewable
  • Three-quarters of the electricity generated in the UK comes from power stations fuelled by fossil fuels
  • Fossil fuels are non-renewable
  • Coal and oil release sulfur dioxide when burnt which causes breathing problems and contributes to acid rain
  • Fossil fuels release carbon dioxide when they burn which adds to the greenhouse effect and increases global warming
  • The main nuclear fuels are uranium and plutonium
  • They are radioactive metals
  • Nuclear fuels are not burnt to release energy, instead nuclear fission reactions in the fuels release heat energy
  • Unlike fossil fuels, nuclear fuels do not produce carbon dioxide or sulfur dioxide
  • Non-renewable, large amount of radioactive material could be released into the environment and nuclear waste remains radioactive and is hazardous for thousands of years
  • Windy energy 
  • Kinetic energy is wind is a renewable energy source
  • Wind turbines use the wind to drive turbines directly
  • As the wind blows, it transfers some of its kinetic energy to the blades which turn and drive the generator
  • Produces no harmful gases, is renewable and there are no fuel costs
  • Noisy and spoil the view and depends on the strength of the wind
  • Water can be used to drive turbines directly
  • Wave: water in the sea rises and falls because of waves on the surface
  • Wave machines use the kinetic energy in this movement to power electricity generators
  • Tides: a…


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