Answer:
1. The electrical potential difference between two points is the voltage between those two points. Voltage is the electromotive force, which is responsible for the movement of electrons or electric current through a circuit.
2. The SI unit for current is Coulomb/second. 1 ampere = 1 coulomb/second. One ampere of current represents one coulomb of electrical charge (6.24 x 1018 charge carriers) moving past a specific point in the circuit in one second. The device used to measure current is called an Ammeter.
