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    In physics, the potential difference is a quantity related to the amount of energy that would be required to move an object from one place to another against various types of forces. The term is most frequently used as an abbreviation of 'electrical potential difference', but it also occurs in many other branches of physics. Only changes in potential or potential energy (not the absolute values) can ever be measured.


        Potential difference
            Explanation
            See also

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    Explanation

    Potential difference is the difference in some quantity between two points in a conservative vector field of that quantity. Some examples are listed below.

      In fluid systems the potential difference is the difference in pressure. Unit: pascals.
      In thermal systems the potential difference is the difference in temperature. Unit: kelvins.

    In some engineering fields, "potential" is sometimes described as the 'across' variable, whereas flux is the 'through' variable. The product of the flux and the potential difference is the power, which is the time rate of change of energy.

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    Scientus.org Dictionary (Yet Another Wiki) RC : 1.39
    MIT OpenCourseWare
    This article is licensed under the GNU Free Documentation License [copyleft]. It uses material from the Wikipedia article "Potential difference". link