# Chapter 12 Glossary Terms

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 Author: yugantpatel ID: 288026 Filename: Chapter 12 Glossary Terms Updated: 2014-11-04 10:04:52 Tags: Science Chapter 12 Terms Folders: Science,Glossary,Terms,Ms.Day Description: Science Chapter 12 Glossary Terms Show Answers:

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1. Direct Current (DC)
• Current in which charged particles travel through a circuit in only one current
• e.g 10 DC wall adapter
2. Alternating Current
• A current in which electrons move back and forth in a circuit
3. Transformer
• An electric device that changes the size of the potential difference of an alternating current
• e.g. Converting 120 to 240
4. Circuit Breaker
• A safety device that is placed in a series with other circuits that lead to appliances and outlets
• e.g. Usually in the basement or garage
5. Fuse
• A safety device that is found in older buildings and some appliances; like a circuit breaker, it is placed in a series with other circuits that lead to appliances and outlets
• e.g. Cars have fuses under the steering
6. Electrical Power
• The rate at which an appliance uses electrical energy
• e.g. Stove uses 50 kwh
7. Watt (W)
• A unit of electrical power, 1 kilowatt = 1000 watts (W)
• e.g. 1000w Hair Dryer
8. Kilowatt
• A practical unit of electrical power; 1 kilowatt = 1000 watts (W)
• e.g. 4 kw lamp
9. Electrical Energy
• The energy that is used by an appliance at a given setting; is determined by multiplying it's power rating by the length of time it is used
• e.g. Dryers use a lot of electrical energy
10. Kilowatt hours
• The practical unit of electrical energy
• e.g. 9.6 cents per kwh
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 kWh of energy used is different at different times of the day
• e.g. 4 cents per kwh
• The electricity that is consumed by an appliance or a device when it is turned off
• e.g. A stove using electricity by clock
15. Efficiency
• The ratio of useful energy output to the total energy input, expressed as a percentage
• e.g. A microwave that is 44% efficient
The continuous minimum demand for electrical power
17. Hydroelectic Power Generation
• The production of electricity using a source of moving water
• e.g. Dams
• A demand for electricity that is greater than the base load and is met by burning coal and natural gas
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 brief period of time
• e.g Water
21. Non-Renewable Energy Source
• A source of energy that cannot be replaced as quickly as it is used
• e.g. Coal
22. Solar Energy
• Energy that is directly converted from the energy of the Sun into electricity
• e.g. Solar Panels
23. Photovoltaic Effect
• The generation of a direct current when certain materials are exposed to light
24. Biomass Energy
• Energy from biomass fuels
• e.g Energy created from animal fuels

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