national grid

• What is the national grid?

  A giant network of transformers and wires
• From where is electricity in the UK primarily generated?

  From a range of different sources
• How do power stations generate electricity?

  By converting thermal energy into electrical energy
• What factors influence how much electricity power stations generate?

  Electricity demand levels
• When does electricity demand generally peak?

  In the late afternoon and evening
• Why do power stations need spare capacity?

  To cope with surges in demand
• What happens when high current flows through a wire?

  It generates lots of heat due to resistance
• How can we achieve high power in electricity transmission?

  By using high voltage and low current
• What is the role of step-up transformers in the national grid?

  To increase the voltage to around 400,000 volts
• Why is it important to lower the voltage before reaching homes?

  High voltages are dangerous and can damage appliances
• What are the main components of the national grid?

  • Transformers
  • Wires
  • Pylons
• How does the national grid minimize energy loss during transmission?

  • Uses step-up transformers to increase voltage
  • Keeps current low to reduce heat generation
• What voltage does the national grid step down to for household use?

  230 volts
• What should you do if you found the video useful?

  Like and subscribe to the channel