# Electricity Chapter 12 Glossary Terms

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 Author: Agamjyot642 ID: 287878 Filename: Electricity Chapter 12 Glossary Terms Updated: 2014-11-03 22:39:12 Tags: Electricity Folders: Description: Ms.Day Show Answers:

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1. Direct Current (DC)
Def: The current from a cell in which charged particles in a circuit only travel in one direction from the negative terminal to the positive terminal.

E.g. remote, cell phone, camera, anything that uses batteries and cells.

2. Alternating Current (AC)
Def: Electrons can move back and forth but there is no net movement of electrons in either direction.

E.g. fridge, washer, blender, toaster, anything that needs to be plugged into a wall outlet.
3. Transformer
Def: A transformer is used to change the potential difference of an alternating current to the potential difference needed.

- There are 2 types of transformers a step-up transformer, and a step-down
4. Circuit Breaker
Def: A circuit breaker limits the amount of current in a circuit to prevent overheating in wires.

5. Fuse
Def: Limits the amount of current to set values, prevents over-heating in wires.
6. Electrical Power
Def: The rate an appliance consumes energy measured in watts (W) or kilowatts (kW).
7. Watt (W)
Def: A unit of power, corresponding to the power in an electric circuit.

- Equivalent to one joule per second
8. Kilowatt (kW)
Def: A measure of 1,000 watts of electrical power.
9. Electrical Energy
Def: Energy used by any appliance at given settings measured in kilowatt-hours (kW.h).
10. Kilowatt-Hour (kW.h)
Def: A measure of electrical energy that is equivalent to the power consumption of 1,000 watts or 1 kW for a total of 1 hour.
11. EnerGuide Label
Def: A label giving details on how much energy an appliance ends up using after 1 year with normal use.

12. Smart Meter
Def: A device with a meter that records the total electrical energy used hourly and has the ability to send this information to the utility company automatically.

13. Time of Use Pricing
Def: A pricing system in which the of kW.h of energy is different based on the time of the day.
Def: Electricity that is consumed even when an appliance or device is turned off.

E.g. TV's, clock displays, external power adaptors all require a phantom load

- An easy way to prevent this is to unplug the appliance
15. Efficiency
Def: The ratio of useful energy output to the total energy being input, this is expressed as a percentage.
Def: The continuing minimum demand of electrical power.

- The minimum amount of electrical power needed in Ontario is 12 000 MW.

- 1 MW = 1 megawatt = 106W

- The base load is met by using nuclear power plants
17. Hydroelectric Power Generation
Def: The production of electrical power through the use of the gravitational force of falling or flowing water.

Def: A demand for electricity that is considerably greater than the base load and can be met by burning coal and natural gas.

- The intermediate load is met by generating stations that burn fossil fuels
Def: The largest and highest demand for electricity which can be met by using hydroelectric power and natural gas.

- The peak load is met by using hydroelectric power or burning natural gas
20. Renewable Energy Source
Def: An energy source that can be easily replaced in a relatively short duration of time.

E.g. Wind power, Hydropower, Solar energy, Biomass, Biofuel, Geothermal energy

21. Non-Renewable Energy Source
Def: A source of energy that cant be replaced as quick and fast as it is consumed.

E.g. nuclear fuel, coal burning.

22. Solar Energy
Def: Solar power is the conversion of sunlight into electricity, using panels to convert the energy from the sun to electricity.

- renewable source of energy

23. Photovoltaic Effect
Def: The creation of voltage or electric current in a material upon exposure to light.

24. Biomass Energy
Def: Biomass is fuel that has been developed from organic materials, it is a renewable and sustainable source of energy used to create electricity and other forms of power.

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