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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  • Armature

    Armature, the part of an electric generator or motor that contains the main current-carrying winding. See more »

  • Capacitance

    Capacitance, the ability of an object or a system of objects to store an electric charge. See more »

  • Cathode Rays
    Cathode Rays

    Cathode Rays, in physics, a stream of electrons given off by the negative electrode, or cathode, of a vacuum tube. See more »

  • Circuit Breaker
    Circuit Breaker

    Circuit Breaker, an electric switch designed to break (open) an electric circuit automatically when the circuit is subjected to abnormal conditions. See more »

  • Electric Meter
    Electric Meter

    Electric Meter, or Watt-hour Meter, an instrument that measures the amount of electric energy used by a consumer. See more »

  • Electric Shock
    Electric Shock

    Electric Shock, a condition that occurs when there is a flow of electricity through that body. See more »

  • Electric Switch
    Electric Switch

    Electric Switch, a device for completing and breaking an electric current, or for changing the path of a current. See more »

  • Electrode

    Electrode, a conductor through which an electric current enters or leaves a solution or other medium in an electrical device such as a battery, electrolyt ic cell, or electron tube. See more »

  • Electrometallurgy

    Electrometallurgy, the science of producing metals from metallic ores through the use of electricity. See more »

  • Electroscope

    Electroscope, an instrument used for detecting electric charges or for measuring small electric voltages or currents. See more »

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