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

Shock to the System: Famous Electrocutions

Electricity brings us light, heat and Netflix. But sometimes, when it courses through man, woman or beast, electricity brings sudden death. Which is why executioners in the early 20th century looked at power lines and had light bulbs flash over their heads.

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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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