Chapter 12 Glossary Terms

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  1. Direct Current (DC)
    • Current in which charged particles travel through a circuit in only one current
    • e.g 10 DC wall adapter
  2. Alternating Current
    • A current in which electrons move back and forth in a circuit
    • e.g. 12 AC Adapter
  3. Transformer
    • An electric device that changes the size of the potential difference of an alternating current
    • e.g. Converting 120 to 240
  4. Circuit Breaker
    • A safety device that is placed in a series with other circuits that lead to appliances and outlets
    • e.g. Usually in the basement or garage
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  5. Fuse
    • A safety device that is found in older buildings and some appliances; like a circuit breaker, it is placed in a series with other circuits that lead to appliances and outlets
    • e.g. Cars have fuses under the steering
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  6. Electrical Power
    • The rate at which an appliance uses electrical energy
    • e.g. Stove uses 50 kwh
  7. Watt (W)
    • A unit of electrical power, 1 kilowatt = 1000 watts (W)
    • e.g. 1000w Hair Dryer
  8. Kilowatt
    • A practical unit of electrical power; 1 kilowatt = 1000 watts (W)
    • e.g. 4 kw lamp
  9. Electrical Energy
    • The energy that is used by an appliance at a given setting; is determined by multiplying it's power rating by the length of time it is used
    • e.g. Dryers use a lot of electrical energy
  10. Kilowatt hours
    • The practical unit of electrical energy
    • e.g. 9.6 cents per kwh
  11. EnerGuide Label
    • A label that gives details about how much energy an appliance uses in one year of normal use
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  12. Smart Meter
    • A meter that records the total electrical energy used hour by hour and sends this information to the utility company automatically
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  13. Time of use pricing
    • A system of pricing in which the cost of each kWh of energy used is different at different times of the day
    • e.g. 4 cents per kwh
  14. Phantom Load
    • The electricity that is consumed by an appliance or a device when it is turned off
    • e.g. A stove using electricity by clock
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  15. Efficiency
    • The ratio of useful energy output to the total energy input, expressed as a percentage
    • e.g. A microwave that is 44% efficient
  16. Base Load
    The continuous minimum demand for electrical power
  17. Hydroelectic Power Generation
    • The production of electricity using a source of moving water
    • e.g. Dams
  18. Intermediate Load
    • A demand for electricity that is greater than the base load and is met by burning coal and natural gas
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  19. Peak Load
    The greatest demand for electricity, which is met by using hydroelectric power and natural gas
  20. Renewable Energy Source
    • A source of energy that can be replaced in a relatively brief period of time
    • e.g Water
  21. Non-Renewable Energy Source
    • A source of energy that cannot be replaced as quickly as it is used
    • e.g. Coal
  22. Solar Energy
    • Energy that is directly converted from the energy of the Sun into electricity
    • e.g. Solar Panels
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  23. Photovoltaic Effect
    • The generation of a direct current when certain materials are exposed to light
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  24. Biomass Energy
    • Energy from biomass fuels
    • e.g Energy created from animal fuels
Card Set:
Chapter 12 Glossary Terms
2014-11-04 15:04:52
Science Chapter 12 Terms
Science Chapter 12 Glossary Terms
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