# Glossary terms chapter 12

### Card Set Information

 Author: MaximFrumkin ID: 287892 Filename: Glossary terms chapter 12 Updated: 2014-11-03 19:11:20 Tags: Maxim Frumkin MaximFrumkin Folders: Description: SCIENCE glossary terms Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user MaximFrumkin on FreezingBlue Flashcards. What would you like to do?

1. Direct current (DC)
Current in which charged particles travel through a circuit in only one direction
2. Alternating current
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 alternating current
4. Circuit breaker
• A safety device that is placed in series with other circuits,  which lead to appliances and outlets
• limits the amount of current to a set value
5. Fuse
• Found in older buildings and appliances
• A safety device that is placed in series with other circuits,  which lead to appliances and outlets
• limits the amount of current to a set value
• need to be replaced each time
6. Electrical power
The rate at which an appliance uses electrical energy
7. Watt (W)
• A unit of electrical power
• Joule/second
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
• power rating of appliance × length of time it is used
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
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•h of energy used is different at different times of the day
• The electricity that is consumed by an appliance or device when it is turned off
• appliances with clocks have a phantom load
15. Efficiency
• The ratio of useful energy output to total energy input as a percentage
• =useful energy output/total energy input × 100%
• The continuous minimum demand for electrical power
• met with Nuclear and hydroelectric generated energy
17. Hydroelectric power generation
The generation of electrical power using a source of moving water
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 burning natural gas and using hydroelectric power
20. Renewable energy source
A source of energy that can be generated 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. Solar energy
Energy that is directly converted from the sun into electricity
23. Photovoltaic effect
The generation of a direct current when certain materials are exposed to light.
24. Biomass energy
Energy that is generated from plant and animal matter

What would you like to do?

Home > Flashcards > Print Preview