Electricity Chapter12 Glossary Terms - SNC1DW (Sem1)

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  1. Direct current (DC)
    • Current in which charged particles travel through a circuit in only one direction
    • E.g. Powered by battery or single cell
  2. Alternating Current (AC)
    Current in which electrons move back and forth in a circuit
  3. Transformer
    • An electrical device that changes the size of the potential difference of an alternating current 
    • Step-up and step-down transformers
    • Often at ground level in green boxes but in rural areas cylindrical pole transformers are the norm
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  4. Circuit breaker
    • A safety device that is placed in series with other circuits, which lead to appliances and outlets
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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 series with other circuits, which lead to appliances and outlets
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  6. Electrical power
    The rate at which an appliance uses electrical energy
  7. Watt (W)
    A unit of electrical power
  8. Kilowatt (kW)
    • a practical unit of electrical power
    • 1 kW=1000 W
  9. Electrical energy
    • The energy that is used by an appliance at a given setting
    •     Electrical energy = Rate x Time
  10. Kilowatt-hour (kW∙h)
    The practical unit of electrical energy
  11. EnerGuide label
    • A label that gives details about how much energy an appliance uses in one year of normal use
    • E.g. on a fridge
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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
  14. Phantom load
    • The electricity that is consumed by an appliance or device when it is turned off
    • I.e. Stoves clock
  15. Efficiency
    • The ratio of useful energy output to total energy input 
    • Expressed as a percentage
  16. Base load
    The continuous minimum demand for electrical power
  17. Hydroelectric power generation
    • The generation of electrical power using a source of moving water
    • E.g. Done in Niagara Falls, Canada
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  18. Intermediate load
    A demand for electricity that is greater than the base load and is met by burning coal and natural gas
  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 short period of time 
    • E.g. Solar
  21. Non-renewable energy source
    • A source of energy that cannot be replaced as quickly as it is used 
    • E.g. Fossil fuels - gasoline
  22. Solar energy
    • Energy that is converted directly from the Sun into electricity
    • E.g. Used in calculator, parking meters, on roofs for personal power generation, etc.
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  23. Photovoltaic effect
    • The generation of a direct current when certain materials are exposed to light
    • Also known as solar panels
  24. Biomass energy
    Energy that is generated from plant and animal matter
Card Set
Electricity Chapter12 Glossary Terms - SNC1DW (Sem1)
Electricity Chapter12 Glossary Terms - SNC1DW (Sem1)
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