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


Induction, in physics, a process by which a magnetized or electrically charged object produces magnetism, an electric charge, or an electric voltage in another object without being in contact with it.

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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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