Basic Electrical Concepts

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Alternating current

Back

An electrical current in which electrons move back and forth

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Direct current

Back

An electrical current in which electrons flow in one direction

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Attract

Back

To pull something closer (opposite charges attract/like charges repel)

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Circuit

Back

A closed path in which an electrical current travels

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Conductor

Back

A material, usually a metal, that transmits electricity

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Insulator

Back

A material, usually a nonmetal, that does not transmit electricity

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Semiconductors

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A material, usually a metalloid, that allows partial transmission of electricity

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Electric generator

Back

Any machine that converts mechanical energy to electricity for transmission and distribution over power lines to domestic, commercial, and industrial customers.

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Electric motor

Back

An electrical machine that converts electrical energy into mechanical energy

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Electrical current

Back

Steady or continuous flow of charges