the national grid

• What is the role of Step Up Transformers in the National Grid?

  They increase the potential difference to reduce energy loss
• What percentage of electricity in the UK comes from burning fossil fuels?

  Over 50%
• What percentage of electricity in the UK comes from renewables like wind power?

  25%
• What percentage of electricity in the UK comes from nuclear power?

  Around 20%
• What is the main function of the National Grid?

  To distribute electricity from power stations to homes
• How many homes does the National Grid supply electricity to in the UK?

  Around 25 million homes
• What is a significant problem in transmitting electricity over long distances?

  Energy is lost due to resistance in wires
• How can energy loss in power cables be reduced?

  By using Transformers and high voltage cables
• What happens to electricity after it passes through Step Up Transformers?

  It increases to several hundred thousand volts
• Why is it important to say "less energy is lost" instead of "less electricity is lost" in exams?

  Because only energy loss is relevant in transmission
• What do Step Down Transformers do in the National Grid?

  They reduce the potential difference to around 230 volts
• What is the final voltage of electricity before it enters homes?

  Around 230 volts
• What are the key facts about the National Grid?

  • System of Transformers and cables
  • Step Up Transformers increase potential difference
  • Reduces energy loss in transmission cables
  • Step Down Transformers reduce potential difference before homes
• What is the importance of the National Grid in the UK?

  It connects power stations to homes efficiently