|A||Alternating current:||An electric current that reverses directions at regular intervals (typically 60 times per second); abbreviated "AC." This is the current usually found in homes.|
|Ampere, Amps:||The measurement of the flow of an electric current through a conductor.|
|Anemometer:||An instrument for measuring wind speed and velocity.|
|B||Battery:||A single electric cell, or group of connected cells, that produces a direct electric current.|
|Biomass:||Organic materials such as plants and animal waste that can be used as a fuel.|
|Blackout:||The total loss of electric power supplied by the electric company.|
|Brownout:||A temporary reduction of voltage supplied by the electric company. Typically causes lights to dim.|
|C||Cell:||A container filled with a chemical substance consisting of electrodes and electrolytes that produces an electric current by chemical action.|
|Charge:||Electricity produced by a surplus (positive) or shortage (negative) of electrons in an object.|
|Circuit:||A complete or partial path followed by a flow of electric current.|
|Conductor:||A substance or material that allows electrons, or electrical current, to flow through it.|
|Current:||The flow of electricity through a conductor.|
|D||Direct current:||An electric current flowing in only one direction; abbreviated "DC".|
|Dynamo:||The first type of large generator developed for a power plant.|
|E||Electricity:||A form of energy created by the movement of electrons creating a current. It occurs naturally in the form of lightning, or can be produced with a generator.|
|Electrolysis:||The production of chemical energy by passing an electric current through a liquid called an electrolyte.|
|Electromagnet:||A coil of wire that is wrapped around a soft iron core that is magnetized when electric current flows through it.|
|Electron:||A negatively charged particle that rotates around the nucleus of an atom.|
|Energy:||The power for doing work.|
|F||Fuel cell:||A device in which a fuel, such as hydrogen gas, is combined with oxygen to produce electricity, water, and heat.|
|Fuse:||A safety device with a metal wire or strip that melts when the current gets too strong, thereby cutting off the flow of the electrical current.|
|G||Generator:||A machine for producing electrical current when rotated by an external driver such as a turbine.|
|Geothermal energy:||The heat energy that is stored below the earth's surface.|
|Ground:||A connection from an electrical circuit to the earth.|
|Grid:||The power highways for electricity, including substations, and large power lines.|
|H||Hydroelectricity:||Electric energy made by the conversion of energy produced from running or falling water.|
|I||Insulator:||An object or material that does not let electricity pass through it.|
|K||Kilowatt (kW):||A unit for measuring electrical energy.
1,000 watts = 1 kilowatt
|Kilowatt Hour (kWh):||The use of 1,000 watts of electricity for one full hour.
1 kWh = ten 100 watt bulbs all burning at the same time for one hour.
10 bulbs x 100 watts each x 1 hour = 1,000 watts hours or 1kWh.
|L||Lightning:||A static electrical discharge between two clouds or between a cloud and the earth accompanied by a flash of light.|
|Load:||The power output of a generator or power plant. Also, the resistance of a device to which power is delivered.|
|M||Magnet:||An object surrounded by a magnetic field that has the ability to attract iron or steel.|
|Magnetic field:||A detected force that exists around a magnet.|
|Mechanical energy:||The energy of motion used to perform work.|
|Megawatt:||One million watts, or 1,000 kW.|
|Meter:||An instrument that records or regulates the amount of something passing through it, like electricity, water, or gas.|
|Motor:||A machine that produces motion or power for doing work.|
|N||Nuclear power:||The energy produced by splitting atoms in a nuclear reactor.|
|O||Ohms:||The unit of measurement of the electrical resistance of a material to the flow of current.|
|P||Photosynthesis:||The process in which green plants absorb the energy of sunlight to produce carbohydrates and oxygen from carbon dioxide and water in the presence of chlorophyll.|
|Photovoltaic:||Capable of producing a voltage when exposed to light or other electromagnetic radiation.|
|The capacity, force, or energy used to do work.|
|R||Radio:||The sending or receiving of messages or effects, like sound, by means of electromagnetic waves through the air without a connecting wire.|
|Resistance:||The opposition of a body or substance to energy or electric current passing through.|
|S||Socket:||A hollow opening or cavity into which something fits, such as an electric light socket.|
|Solar energy:||Energy produced by the action of the sun's light or heat.|
|Static electricity:||An electrical charge that builds up due to friction between two dissimilar materials. Friction removes some electrons from one object and deposits them on the other.|
|Switch:||A device for connecting, breaking, or changing the connections in an electrical circuit.|
|T||Thermal:||Of, using, producing, or caused by heat.|
|Transformer:||A device that raises or lowers the voltage or force of AC electricity.|
|Turbine-generator:||A machine in which the energy of a moving fluid, such as wind, water, or steam, is converted to mechanical power that drives an electric generator.|
|V||Volt:||A unit for measuring the force used to produce an electric current; the push or force that moves electric current through a conductor.|
|W||Watt:||A unit for measuring electric power.
1 Kilowatt = 1000 watts.
1 Megawatt = 1,000,000 watts.