Potential difference

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Potential difference is a quantity in physics related to the amount of energy that would be required to move an object from one place to another against various types of force. The term is most frequently used as an abbreviation of 'electrical potential difference' (see below), which is almost synonymous with 'voltage', but it also occurs in many other branches of physics.

In more technical terms, 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 engineering, 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. In simpler language, this is to say that power is energy emitted in a fixed length of time divided by the length of the time interval.

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bg:Електрическо напрежение ca:Diferència de potencial cs:Elektrické napětí da:Elektrisk spænding de:Elektrische Spannung es:Diferencia de potencial it:Differenza di potenziale he:מתח חשמלי nl:Elektrische spanning ja:電圧 pl:Napięcie elektryczne pt:Tensão elétrica ru:Напряжение (электрическое) sl:Električna napetost fi:Jännite sv:Elektrisk spänning zh:電壓