# Chapter 12 glossary terms

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 Author: Anonymous ID: 288046 Filename: Chapter 12 glossary terms Updated: 2014-11-03 20:02:20 Tags: science Folders: Description: science Show Answers:

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1. Direct current
Direct current is current that only flows in one direction, it is most common in batteries.
2. Alternating current
Alternating current is current that travels both forward and backwards in a wire, it is more practical than direct current an is used in most houses today.
3. Transformer
A transformer is a device used to increase or decrease the voltage of alternating current,they are often used to help transport electricity long distances.
4. Circuit breaker
A device used to automatically stop the flow of electricity when it gets to a certain amount of current flowing through it.Circuit breakers are used in most households today.
5. Fuse
A fuse is a device that stops the flow of electricity when the amount of current becomes too high,it does this by having a strip that melts when the current is too high.
6. Electrical power
Electrical power is the rate that power is used in a circuit (consumption) it is measured in watts.
7. Watt(W)
A watt is a measurement of electricity that is equal to one joule per second.
8. Kilowatt(kW)
A kilowatt is a measurement of electric consumption that is equal to 1000 watts.
9. Electrical energy
Electrical energy is energy stored on particles in their electric field.
10. Kilowatt-hour (kW-h
A kilowatt-hour is a unit of energy that is equal to 1 kW per hour it is used to calculate energy consumption.
11. Energuide label
A Energuide label is a label to help determine the appliance users/owners how much electricity will be used based on the appliances consumption levels.
12. Smart meter
A smart meter is a device that automatically displays the amount of kW-h that have been used.
13. Time of use pricing
Time of use pricing is the pricing system that has different rates at different times of the day, e.g. electricity rates will be cheaper if you use electricity at night than in the evening.
Phantom load is the bare minimum amount of electricity it is used even when the device is off or on standby.
15. Efficiency
Electrical efficiency is the amount of useful energy output from a device divided by the amount of energy input.
The base load is the minimum amount of energy used at one time it is covered mostly by nuclear and hydroelectric power plants.
17. Hydroelectric power generation
Hydroelectric power generation is the power generation by having pressurized water flow through a generator it is used to help cover the base load.
Intermediate load is the medium amount of energy used by a power grid it is not as great as peak load but greater than base load.
Peak load is the absolute most amount of energy that can be used by a power grid.
20. Renewable energy source
A renewable energy source is a energy source that will never run out even if used at a incredibly high rate.(solar, wind)
21. Non-renewable energy source
A non-renewable energy source is a energy source that will eventually run out.(coal,natural gas)
22. Solar energy
Solar energy is energy generated by the conversion of solar energy to electric energy.
23. Photo voltaic effect
• Photovoltaic effect is the creation of electric current in a material when exposed to light.
• e.g. this happens in solar panels.
24. Biomass energy
Biomass energy is energy generated by the burning of organic materials such as scrap lumber.

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