Physics- Generating electricity

Generating electricity

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Generating electricity

Fuel for electricity

  • Electricity generators in power stations are driven by turbines
  • Coal, oil and natural gas are turned in fossil-fuel power stations
  • Uranium or plutonium is used as the fuel in a nuclear power station
  • Biofuels are renewable sources of energy which can generate electricity
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Generating electricity

Energy from wind and water

  • A wind turbine is an electricity generator on top of a tall tower
  • Waves generate electricity by turning a floating generator
  • Hydroelectricity generators are turned by water running downhill
  • A tidal power station traps each high tide and uses it to turn generators
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Generating electricity

Power from the Sun and the Earth

  • Solar cells transfer solar energy into electricity
  • Solar heating panels use the Sun's energy to heat water directly
  • Geothermal energy comes from inside the Earth
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Generating electricity

Energy and the environment

  • Burning fossil fuels produces greenhouse gases that cause global warming
  • Nuclear fuels produce radioactive waste
  • Using renewable energy resources can affect plant and animal life
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Generating electricity

The National Grid

  • The National Grid distributes electricity from power stations to our homes
  • Step-up and step-down transformers are used in The National Grid
  • A high voltage reduces energy wastage and maked the system more effiecient
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Generating electricity

Big energy issues

  • Ga- fired power stations and pumped-storage stations can meet variations in demand
  • Nuclear, coals and oil power stations can meet base-load demand
  • Nuclear power stations, fossil fuels power stations using carbon capture and renewable energy are all likely to contribute to future enenrgy supplies
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