mains electricity

• What type of current is Mains electricity in the UK?

  Alternating current (AC)
• What is the frequency of alternating current in the UK?

  50 hertz
• What is the potential difference of Mains electricity in the UK?

  Around 230 volts
• What is the purpose of Three core cable in electrical appliances?

  To connect appliances to Mains electricity
• What material are the wires in Three core cable made of?

  Copper
• What is the function of the plastic coating on the wires?

  To prevent electrical conduction
• What is the brown wire in Three core cable called?

  Live wire
• What does the Live Wire carry?

  A potential difference of around 230 volts
• What is the blue wire in Three core cable called?

  Neutral wire
• What is the potential difference of the Neutral Wire?

  Around 0 volts
• What is the green and yellow striped wire called?

  Earth wire
• What is the function of the Earth wire?

  To provide safety by grounding
• Why is the Live Wire considered dangerous?

  It can be fatal if touched
• What happens if someone touches the Live Wire?

  A current flows through them to the Earth
• What can happen if the Live Wire touches a metal case?

  The case can become live
• How does the Earth wire protect against electric shock?

  It directs current to the ground
• What happens when the metal case becomes live?

  A huge current flows to the Earth
• What does the fuse do in an electrical circuit?

  It melts and shuts off the current
• What are the functions of the Live Wire, Neutral Wire, and Earth Wire?

  • Live Wire: Carries 230 volts from supply
  • Neutral Wire: Completes the circuit at 0 volts
  • Earth Wire: Provides safety by grounding
• What is the potential difference of the Earth?

  0 volts
• What is the significance of the potential difference in the Live Wire?

  It indicates the risk of electric shock