Transfer Of Thermal Energy - Radiation

10 Questions | Total Attempts: 187

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Thermal Energy Quizzes & Trivia

Online Quiz - Radiation


Questions and Answers
  • 1. 
    Which types of surface are the best absorbers and the best emitters of infra‑red radiation?               
    • A. 

      Best absorber - black and dull Best emitter - black and dull

    • B. 

      Best absorber - black and dull Best emitter - white and shiny

    • C. 

      Best absorber - black and shiny Best emitter - white and dull

    • D. 

      Best absorber - white and dull Best emitter - black and shiny

  • 2. 
    A small piece of aluminium is placed in your hand. After a short while, your hand feels warm. Explain why this happens.
    • A. 

      Aluminium reflects the thermal energy radiated by the hand.

    • B. 

      Aluminium absorbs thermal energy radiated from the surroundings.

    • C. 

      Aluminium radiates thermal energy well.

    • D. 

      Aluminium is a good absorber of radiation.

  • 3. 
    In the following set-up, equal volumes of hot water were poured into the containers and the temperatures of both containers and contents were the same. After an hour, the temperature of container P was found to be lower than that of container Q. This shows that P is a better ____ of heat than Q.
    • A. 

      Conductor

    • B. 

      Absorber

    • C. 

      Radiator

    • D. 

      Conductor and absorber

  • 4. 
    A small cork is fixed with wax to a metal plate. An electric heater is placed close to the plate. After a time, the wax melts and the cork drops off. How does thermal energy reach the wax?
    • A. 

      By conduction only

    • B. 

      By conduction and convection

    • C. 

      By radiation and conduction

    • D. 

      By radiation and convection

  • 5. 
    A copper plate is heated to 100oC and then allowed to cool. It cools by emitting __________.         
    • A. 

      Electrons

    • B. 

      Gamma radiation

    • C. 

      Infra-red radiation

    • D. 

      Ultraviolet radiation

  • 6. 
    A vacuum will prevent heat transfer by ___________.
    • A. 

      Convection only

    • B. 

      Conduction and convection only

    • C. 

      Radiation only

    • D. 

      Conduction, convection and radiation

  • 7. 
    A solar heater uses energy from the Sun to heat water. The panels of the heater are painted black. Why is this?
    • A. 

      To improve absorption of infra-red radiation

    • B. 

      To improve emission of infra-red radiation

    • C. 

      To improve the conducting properties of the panel

    • D. 

      To reduce convection currents

  • 8. 
    Which of the following will be the best absorber of infra-red radiation?
    • A. 

      Dark animal fur

    • B. 

      Shiny metal tray

    • C. 

      White plastic bag

    • D. 

      Writing paper

  • 9. 
    When metal hot-water pipes are used to heat air in a room, how is most of the energy transferred through the metal and through the air?
    • A. 

      Through metal - conduction through air - convection

    • B. 

      Through metal - conduction through air - radiation

    • C. 

      Through metal - convection through air - convection

    • D. 

      Through metal - convection through air - radiation

  • 10. 
    The thermal energy from a campfire during a scout camp reaches the scouts’ faces mainly by __________.
    • A. 

      Radiation only

    • B. 

      Radiation and conduction

    • C. 

      Convection only

    • D. 

      Radiation and convection

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