Physics Grade 9

Card Set Information

Author:
Mitra
ID:
214521
Filename:
Physics Grade 9
Updated:
2013-04-19 14:05:51
Tags:
Ch12
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Description:
Generating and Using Electricity
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  1. Direct Current (DC)
    Current in which charged particles travel through a circuit in only one direction.
  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. 
  4. Circuit Breaker
    A safety device that is placed in series with other circuits, which leads to appliances and 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.
  6. Electrical Power
    The rate at which an appliance uses electrical energy. 
  7. Watt (W)
    A unit for electrical power.
  8. Kilowatt (KW)
    A practical unit of electrical power. 1KW = 1000W
  9. Electrical Energy
    The energy that is used by an appliance at a given setting, multiply power rating by length of time used. 
  10. Kilowatt-hour KW x 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. 
  12. Smart Meter
    A meter that records the total electrical energy used hour by hour and sends this information to the utility company automatically.
  13. Time of use pricing
    A system of pricing in which the cost of each kw x h 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. 
  15. Efficiency
    The ratio of useful energy output to the energy input, expressed as a percentage.
  16. Base Load
    The continuous minimum demand for electrical power. 
  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. Hydroelectric Power Generator
    The generation of electrical power using a source of moving water.
  20. Renewable Energy Source
    A source of energy that can be replaced in a relatively short period of time.
  21. Non-Renewable Energy Source
    A source of energy that cannot be replaced as quickly as it is used. 
  22. Wind Farm
    Many large wind turbines at one location. 
  23. Solar Energy
    Energy that is directly converted from the Sun into electricity. 
  24. Photovoltaic Effect
    The generation of a direct current when certain materials are exposed to light. 
  25. Biomass Energy
    Energy that is generated from plant and animal matter. 

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