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Grade 9 week 6

  •  English    17     Public
    Lights and Heat from Electricity & Electrical Conductors, Insulators and Semiconductor
  •   Study   Slideshow
  • It is define as the flow of energy from a warm object to a cooler object.
    Heat
  •  10
  • What are the three ways in transferring heat?
    Conduction Convection Radiation
  •  15
  • It is made of a tungsten wire enclosed in a glass bulb from which air has been removed.
    Filament lamps
  •  15
  • What is the melting point of tungsten as a filament?
    3400 degrees Celsius
  •  15
  • An electronic component that has mercury vapor in the glass tube which emits ultraviolet radiation when switched on.
    Fluorescent lamps
  •  15
  • States that energy can neither be created nor destroyed but can be converted from one form of energy to another.
    Law of conservation of energy
  •  15
  • One of the main ways of explaining differences in conduction. This uses the ‘band’ of material to explain a number of physical properties of conduction
    Band Theory
  •  15
  • Give example of semiconductor
    Transistor, solar cells, silicon and more
  •  15
  • What are the examples of insulator inside the video presentation?
    Wall insulation Furnace insulation Sound insulation Electrical insulation
  •  15
  • this normally comes in It is a form of thermal insulation to regulate the heat flow between a building and the outside environment.
    Wall insulation
  •  15
  • A kind of insulation this can range from the coating of wire in household circuitry through to the insulation in capacitors in commercial and consumer goods.
    Electrical insulation
  •  15
  • This is most obviously applied to sound studios, however, it can also be applied to regular buildings to prevent disturbances between rooms and properties.
    Sound insulation
  •  15
  • It has a conductivity value between that of a conductor such as silver and an insulator, such as mica.
    Semiconductor
  •  15
  • It prevents the flow of energy between two objects.
    Insulator
  •  15
  • It is the transfer of heat through space in the form of waves.
    Radiation
  •  15
  • The heat transfer in liquids and gases as particles circulate in currents. What kind of heat transfer is this?
    Convection
  •  15