Electricity is a major force of nature. In this section, you can learn how electricity works and what its potential uses are.

Fuel Cell

Fuel Cell, a device that converts the chemical energy of a fuel directly into electrical energy.

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  • Resistance, Electrical

    Resistance, Electrical

    Resistance, Electrical, the opposition that a material offers to the passage of an electric current. See more »

  • Rheostat


    Rheostat, a device used to regulate an electric current by increasing or decreasing the resistance of the circuit. See more »

  • Static Electricity

    Static Electricity

    Static Electricity, a motionless electrical charge, as distinguished from current electricity. See more »

  • Superconductivity


    Superconductivity, the property that certain materials have of losing all resistance to an electric current. See more »

  • Thermocouple


    Thermocouple, an electrical device that responds to a difference in temperature by producing an electric current. See more »

  • Transducer


    Transducer, in electronics, a device that converts electric energy into some other form of energy, or vice versa. See more »

  • Transistor


    Transistor, a solid-state device used in electronic circuits primarily as an amplifier or switch. See more »

  • Van de Graaff Generator

    Van de Graaff Generator

    Van de Graaff Generator, an electric induction machine used in nuclear research and cancer therapy. See more »

  • Wheatstone Bridge

    Wheatstone Bridge

    Wheatstone Bridge, a device for measuring electrical resistance. One form of Wheatstone bridge is shown in the illustration. See more »

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