Mains Electricity

Cards (25)

  • 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?
    230 volts
  • How are electrical appliances connected to mains electricity?
    Using three core cable
  • What material are the wires in a three core cable made of?
    Copper
  • What is the purpose of the plastic coating on the wires?
    It prevents electrical conduction
  • What is the brown wire in a three core cable called?
    Live wire
  • What potential difference does the live wire carry?
    230 volts
  • What is the blue wire in a three core cable called?
    Neutral wire
  • What is the potential difference of the neutral wire?
    Around zero volts
  • What is the green and yellow striped wire called?
    Earth wire
  • What is the function of the earth wire?
    It provides safety by grounding
  • Why is the live wire dangerous?
    It can be fatal if touched
  • What happens if someone touches the live wire?
    A current flows through them to earth
  • Why can appliances with metal cases be dangerous?
    If the live wire touches the case
  • How does the earth wire protect against electric shock?
    It directs current safely to the ground
  • What happens if the live wire comes loose in a metal-cased appliance?
    The case can become live
  • What occurs when a live case is touched?
    A fatal electric shock can happen
  • 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 current at 230 volts
    • Neutral wire: Completes the circuit at 0 volts
    • Earth wire: Provides safety by grounding
  • What should you learn about the fuse symbol?
    It represents the fuse in a circuit
  • What is the potential difference of the earth?
    Zero volts
  • What is the significance of the three core cable in electrical appliances?
    It ensures safe operation of appliances
  • How does the function of the earth wire differ from the live wire?
    The earth wire is for safety, live carries current
  • What is the role of the neutral wire in a circuit?
    It completes the circuit with the live wire