Definition and formula of electric potential difference
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The potential difference between two points in an electric field may be defined as the amount of work done in moving a unit positive charge from one point to other against the electrostatic forces.
Here the test charge should be small so that it does not disturb the distribution of source charge.
V= Work done/q○.
SI unit of potential difference is volt (V).
Zenn:
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V=Uq. The electric potential difference between points A and B, VB−VA is defined to be the change in potential energy of a charge q moved from A to B, divided by the charge. Units of potential difference are joules per coulomb, given the name volt (V) after Alessandro Volta
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