In short
Electric current is the rate of flow of electric charge, . It is measured in amperes (A), where one ampere is one coulomb of charge each second.
In a metal wire, the charges that move are electrons, but the conventional current is drawn in the opposite direction, from the positive terminal to the negative. A current in a circuit is the same at every point in series. The potential difference (voltage) is the energy given to each unit of charge. Current is measured with an ammeter connected in series.
A charge of flows past a point in minutes (). The current is .
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