chapter 12 glossary terms

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  1. Direct Current (DC)
    Current in which charged particles travel through a circuit only in one direction

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  2. Alternating Current
    A current in which electrons move back and forth in a circuit         

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  3. Transformer
    A electrical device that changes the size of the potential difference of an alternating current

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  4. Circuit Breaker
    A safety device that is placed in series with other circuits that lead to appliances and other outlets
  5. Fuse
    A safety device that is found in older buildings and some appliances; like a circuit breaker, it is placed in series with other circuits that lead to appliances and outlets.

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  6. Electrical power
    A rate at which an appliance uses the electrical energy
  7. Watt (W)
    A unit of electrical power;  1 kilowatt = 1000 W
  8. Kilowatt (W)
    A practical unit of electrical power; 1 kW =  1000 W
  9. Kilowatt-hour (kW⋅h)
    A practical unit of electrical power; 1 kW =  1000 W
  10. EnerGuide label
    A label that gives details about how much energy an appliances uses in one year of normal use

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  11. 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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  12. Time of use pricing
    A system of pricing in which the cost of each kW.h of energy used is different at different times of the day

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  13. Phantom load
    The electricity that is consumed by an appliance or a device when it is turned off
  14. Efficiency
    The ratio of use energy output to the total energy input, expressed as  a percentage
  15. Base load
    The continuous minimum demand for electrical power
  16. Hydroelectric power
    The production of electricity using the source of moving water

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  17. Intermediate load
    A demand for electricity that is greater than the base load and is met by burning coal and natural gas
  18. Peak load
    The greatest demand for electricity, which is met by using hydroelectric power and natural gas
  19. Renewable energy source
    A source of energy that can be replaced in a relatively brief period of time

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  20. Non-renewable energy source
    A source of energy that cannot be replaced as quickly as it is used

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  21. Solar Energy
    Energy that is directly converted from the energy of the Sun into electricity

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  22. Photovoltaic effect
    The generation of a direct current when certain materials are exposed to light
  23. Biomass energy
    The total mass of living organisms in a defined group or area
  24. Electrical energy
    The energy that is used by an appliance at a given setting; is determined by multiplying its power rating by the length of time it is used.

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chapter 12 glossary terms
chapter 12 glossary terms
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