Ohm’s law: Ohm’s law states that the voltage across a conductor is directly proportional to the current flowing through it, provided all physical conditions and temperature remain constant.
V = IR
Potential difference: Potential difference between any two points is defined as the amount of work done in moving a unit charge from one point to another. The unit of potential difference is volt.
1 Volt: one joule of energy is required to move one coulomb of charge is the 1 volt