GCSE Physics (AQA)

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Solar Energy

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Energy National and global energy resources

Solar Energy

3:08 Renewable Energy Resources
Spec 4.1.3
Previous Wind Energy Next Introduction to Circuits
  • Solar panels generate an electric current when light is directed at them.
  • The sun is a significant energy resource, releasing a large amount of energy, heating the planet, and being the start of the food chain.
  • Solar panels convert solar energy into an electric current by releasing electrons within the material.
  • Solar panels produce less electricity compared to other resources.
  • In the UK, solar panels contribute to the national grid or power individual homes and devices.
  • Solar farms, consisting of hundreds of panels, contribute to the national grid by moving to face the sun.
  • Solar panels can be used on homes as roof panels, reducing reliance on the national grid.
  • Solar panels are used in devices like calculators, traffic lights, smartwatches, and power banks.
  • Solar panels are less effective on cloudy days due to reduced sunlight and current production.
  • Some countries use solar energy as a substitute for fossil fuels when conditions allow.
  • Solar energy is renewable and clean, but fossil fuels are more reliable as they can be burned anytime.
  • Switching between solar and fossil fuels is possible, using fossil fuels on cloudy days and solar power on sunny days.
  • Advantages of solar power: clean, renewable, no pollution, near limitless, easy to set up, small, and cheap to build.
  • Disadvantages of solar power: weather-dependent, low energy gain, requiring hundreds of panels to match fossil fuel output.

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