Additional Mains Electricity

10 Questions | Total Attempts: 96

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Electricity Quizzes & Trivia

Basic Quiz on mains electricity and safety in the home


Questions and Answers
  • 1. 
    A Cathode Ray Oscilloscope(CRO) is used to show a picture of the the changing voltage in an electrical circuit. The difference between a Direct Current(dc) and an Alternating Current(ac) is:-
    • A. 

      Dc is a flat line and ac looks like a wave

    • B. 

      Dc looks like a wave and ac is a flat line

    • C. 

      Dc is a line up the screen and ac is a line across the screen

    • D. 

      Dc is a line across the screen and ac is a line up the screen

    • E. 

      Dc is a square and ac is a circle

  • 2. 
    The earth wire has green and yellow stripes. This best reason for this choice is:-
    • A. 

      There is no sensible colour to represent the earth.

    • B. 

      The scientists could not agree on one colour

    • C. 

      There were two different colours used in the previous systems

    • D. 

      It allows colour blind people to identify the earth

    • E. 

      The stripe looks more fashionable

  • 3. 
    What is the colour of the live wire and where is it connected?
    • A. 

      Blue and connected to the Left pin

    • B. 

      Blue and connected to the Right pin

    • C. 

      Brown and connected to the Left pin

    • D. 

      Brown and connected to the Right pin

    • E. 

      Green and Yellow and connected to the Top pin

  • 4. 
    The main purpose of the earth wire is:-
    • A. 

      To prevent explosions

    • B. 

      To prevent electric shocks

    • C. 

      To prevent fires

    • D. 

      To keep the appliance working

    • E. 

      To complete the electric circuit

  • 5. 
    What type of electrical appliance will have an earth wire connected to it?
    • A. 

      All powerful appliances

    • B. 

      All heating appliances

    • C. 

      Any appliance in a plastic case

    • D. 

      Any appliance in a wooden case

    • E. 

      Any appliance in a metal case

  • 6. 
    You have the choice of a 1A, 3A, 5A, 10A or 13A fuse. Which one would you fit to a 1250W hair dryer to work with 250V mains?
    • A. 

      1A

    • B. 

      3A

    • C. 

      5A

    • D. 

      10A

    • E. 

      13A

  • 7. 
    A current of 12A flows through through a kettle for 5 mins while it boils some water. How much CHARGE flows through the kettle?
    • A. 

      1.4C

    • B. 

      17C

    • C. 

      60C

    • D. 

      300C

    • E. 

      3600C

  • 8. 
    A TV recieves 4800J of energy from 20C of charge. What is the potential difference across the TV?
    • A. 

      240V

    • B. 

      2400V

    • C. 

      4820V

    • D. 

      9600V

    • E. 

      96000V

  • 9. 
    A 9.9kW shower heater is used with 220V mains. What current flows through the heater?
    • A. 

      0.45A

    • B. 

      4.5A

    • C. 

      45A

    • D. 

      210.1A

    • E. 

      229.9A

  • 10. 
    THe two key reasons why circuit breakers are used instead of fuses are:-
    • A. 

      They work faster and they are cheaper

    • B. 

      They work faster and they are easier to reset

    • C. 

      They are cheaper and they are easier to reset

    • D. 

      Fuses are expensive and it takes time to find the correct one.

    • E. 

      Fuses can give off toxic fumes and are difficult to replace