Current Circuit Voltage. Take this circuit as an example. And therefore 1 volt is equivalent to 1 joule per coulomb of charge.
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Voltage is the difference in charge between two points. Take this circuit as an example. Current is the rate at which charge is flowing.
Voltage is defined as potential energy per charge.
Where v is the voltage e is the difference in potential energy in joules and q is the charge in coulombs. Voltage is to do with the energy carried around the circuit by the charge carriers. In a single one loop circuit the amount of current at any point is the same as the amount of current at any other point. The amount of energy carried by an individual charge carrier is very small so we consider the energy transferred by a whole unit of charge the coulomb.
