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

What is voltage?

Voltage is how we measure the difference in electric potential energy. Learn about what voltage is from this article.

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  • 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 »

  • Electricity


    Electricity, the phenomena caused by a fundamental property of matter called electric charge. 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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