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electricity
1. A fundamental form of energy, consisting of oppositely charged electrons and protons that produce light, heat, magnetic force, and chemical changes.

The flow of this energy is known as "electric current".

2. The general phenomenon of charges at rest and in motion.
3. Energy resulting from the flow of charge particles; such as, electrons or ions.
This entry is located in the following unit: Photovoltaic Conversion Efficiency Terms + (page 8)
Electricity, Its Past and Present Development
Electricity and electronic tools and products are an essential element in our modern times.
This entry is located in the following unit: Index of Scientific and Technological Topics (page 1)
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Word Entries containing the term: “electricity
electricity-measuring units
1. The amp, short for ampere, is the amount of electric current flowing in a wire.

The electric current is measured in electrons per second.

2. The ohm is a measure of resistance to current.

The higher the resistance at a given voltage, the less current flows. Higher resistance can be obtained by using thinner wires or by using materials which are less efficient conductors.

3. The volt is a measure of the potential energy of the source or the "pressure" pushing electrons through the wire.
4. A watt is a unit of electric power or the speed at which an electric current can function.

Electric energy is expressed in units called watt-hours, which is what is usually referred to in everyday speech when someone says "watts".

A 100-watt light bulb, that operates for one hour, uses one watt-hour and electricity which is used in a home is normally metered in kilowatt-hours, or thousands of watt-hours.

This entry is located in the following unit: Electrical and Electronic Topics (page 1)