what is potential difference
It is often more convenient to consider the electrostatic potential V rather than electric field E as the motivating influence for the flow of electric charge. The generalized vector properties of E are usually unimportant. The change in potential dV across a distance dr in an electric field is
dV = -E·dr
A positive charge will move from a higher to a lower potential. The potential is also
referred to as the potential difference or, incorrectly, as just voltage:
referred to as the potential difference or, incorrectly, as just voltage:
RRemember that current flowing in a conductor is due to a potential difference between its ends. Electrons move from a point of less positive potential to more positive potential and the current flows in the opposite direction.
The SI unit of potential difference is the volt (V).
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