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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.

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

• In electrical engineering, electrical potential difference is the voltage present between two points, or the voltage drop transversely over an Electrical impedance (from one extremity to another). Rudolf F. Graf, "Potential difference", Dictionary of Electronics; Radio Shack, 1974-75. Fort Worth, Texas. ISBN B000AMFOZY It is related to the energy that would be required to move a unit of Electric charge from one point to the other against the electrostatic field that is present. As potential difference increases, the current increases as well. Unit: joules per coulomb = volt
• In mechanics, the gravitational potential difference between two points on Earth is related to the energy that would be required to move a unit mass from one point to the other against the Earth's gravity. Unit: joules per kilogram.
• In fluid systems the potential difference is the difference in pressure. Unit: pascal (unit)s.
• 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 (physics), which is the time rate of change of energy.

See also

• Extra low voltage
• Low voltage
• High voltage
• Extra high tension (EHT), Extra high voltage
• Mains electricity (an article about domestic power supply voltages)
• List of countries with mains power plugs, voltages and frequencies
• Potential energy
• SI electromagnetism units
• Volt

References External links

• Potential vs. Potential difference

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.

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

• In electrical engineering, electrical potential difference is the voltage present between two points, or the voltage drop transversely over an Electrical impedance (from one extremity to another). Rudolf F. Graf, "Potential difference", Dictionary of Electronics; Radio Shack, 1974-75. Fort Worth, Texas. ISBN B000AMFOZY It is related to the energy that would be required to move a unit of Electric charge from one point to the other against the electrostatic field that is present. As potential difference increases, the current increases as well. Unit: joules per coulomb = volt
• In mechanics, the gravitational potential difference between two points on Earth is related to the energy that would be required to move a unit mass from one point to the other against the Earth's gravity. Unit: joules per kilogram.
• In fluid systems the potential difference is the difference in pressure. Unit: pascal (unit)s.
• 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 (physics), which is the time rate of change of energy.

See also

• Extra low voltage
• Low voltage
• High voltage
• Extra high tension (EHT), Extra high voltage
• Mains electricity (an article about domestic power supply voltages)
• List of countries with mains power plugs, voltages and frequencies
• Potential energy
• SI electromagnetism units
• Volt

References External links

• Potential vs. Potential difference

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Potential difference - Wikipedia, the free encyclopedia
In physics, the potential difference or p.d. between two points is the amount of work that would need to be done on a unit electric charge to move it from one point to the other ...

Voltage - Wikipedia, the free encyclopedia
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