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Glossary of Terms

anode
the electron-collecting area of an electron tube; see cathode
battery
a group of electric cells for providing electric current; a single electric cell
benzene
a colorless, highly-flammable liquid obtained chiefly in the distillation of coal and used as a solvent and in making dyes and drugs
capacitance
the property of an electric nonconductor that permits the storage of energy
cathode
the electron-emitting area of an electron tube; see anode
charge
an excess or deficiency of electrons in an atom
circuit
the complete path through which current flows, from the source and back again
combustion
the process of burning
condenser
a device providing capacitance; see capacitance
conductor
any material that allows electricity to pass through
discharge
to remove the electrical energy from something
electric motor
an engine for doing work using electricity
electric shock
a sudden discharge from an electrically charged object; see discharge
electrical current
a continuing flow of charged particles
electrician
a person who designs, installs, operates, or repairs electrical equipment
electricity
a fundamental phenomenon in nature seen in the attractions and repulsions of oppositely charged objects and utilized as a source of energy ion the form of a current
electrify
to charge with electricity
electrode
a conductor used to make contact with a non-conducting part of a circuit
epitaph
an inscription in memory of a deceased person
fossil fuels
coal, natural gas, and petroleum; energy sources obtained from deposits of ancient organic remains
generator
a machine that produces electricity
hydroelectricity
the production of electricity by waterpower
ion
an electrically charged particle
meteorology
the science of the atmosphere and its conditions
militia
a part of the organized armed forces of a country called upon in times of crisis
minus
having negative qualities due to an excess of electrons
negative
charged due to an excess of electrons
patent
a legal document giving inventors the exclusive rights to their invention for a number of years
plasma
a gas composed of electrically charged particles
plus
having positive qualities due to an excess of protons
positive
charged due to an excess of protons
precipitation
atmospheric water that falls as rain, snow, or hail
radioactivity
the property of some elements to emit spontaneously rays of radiant energy by the decay of their atomic nuclei
solar energy
radiant energy from the sun
technology
the application of scientific advances to benefit humanity
telecommunications
communication at a distance as by telephone or radio
transformer
a device that changes the intensity of electric current
uncharged
lacking electric charge due to a balance of protons and electrons
wind energy
energy obtained from turbine engines powered by wind


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