Electricity Chapter 12

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Anonymous
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287853
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Electricity Chapter 12
Updated:
2014-11-02 09:28:43
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Electricty
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Electricity glossary terms
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  1. Direct Current (DC)
    Current from a cell in which charged particles move from the negative terminal to the positive one.
  2. Alternating Current (AC)
    • Moving a magnet in and out of a coil of wire generates a current in the coil
    • The current moves one way when a pole of the magnet is inserted into the coil and the opposite direction when the magnet is removed from the coil
    • Electrons moving back and forth with no net direction
  3. Transformer
    • A simple electrical device that can change the potential difference of an AC
    • Do not work with DC
    • Can reduce the V of increase the V
  4. Circuit Breaker
    A safety device that is put in series with other circuits that lead to appliances and outlets
  5. Fuse
    A safety device in older buildings/ appliances; like a circuit breaker, it is placed in series with other circuits and leads to appliances and outlets.
  6. Electrical Power
    The rate at which a device uses electrical energy.
  7. Watt (W)
    The measurement for electrical power.
  8. Kilowatt (KW)
    1000W
  9. Electrical Energy
    The energy that is used by a device at a given setting.
  10. Kilowatt-hour
    Measurement for electrical energy.
  11. Energuide Lable
    A label that gives details about how much energy in an appliance is used over one year of normal use.
  12. Smart Meter
    • A meter that records the total amount of electrical energy used hour by hour
    • Automatically sends info to utility companies
  13. Time of Use Pricing
    A system of pricing in which the cost of each KWh energy used is different at different times in a day.
  14. Phantom Load
    • The electrical energy that is consumed while a device is not turned onĀ 
    • Best way to prevent it is to unplug the device
  15. Efficiency
    • The ratio of useful energy output to total energy input
    • Energy input id the power multiplied by time appliance is on
  16. Base Load
    • The continuous minimum demand for electrical power
    • Ontario = 12 000W
    • In Ontario is is primarily generated using hydroelectric and nuclear power
  17. Hydroelectric Power
    The production of electricity using a source of running water.
  18. Intermediate Load
    • A demand for electricity higher than the base load
    • Met by burning coal and natural gasses
  19. Peak Load
    The greatest demand for electricity.
  20. Renewable Energy Source
    • Energy that can be renewed in a relatively short amount of time
    • Eg. hydroelectrical power
  21. Non-Renewable Energy Source
    • Energy that cannot be renewed as quickly
    • Eg. fossil fuels
  22. Solar Energy
    • Positives - renewable, environmentally friendly, at 100% efficiency 1 m2 can supply power for most electrical appliances
    • Negatives - most only work at 25% efficiency, not concentrated, high cost, require sunlight which isn't always present
  23. Photovoltaic Effect
    The generation of a DC when certain materials are exposed to light.
  24. Biomass Energy
    • Positives - only returns as much carbon to the atmosphere as was originally in the organism (neutral), results in less acid rain, no heavy metals emitted, renewable
    • Negatives - resources to burn aren't very available

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