Correct option is B
The SI unit of Electric Potential Difference is the Volt. One volt is defined as the potential difference between two points in a circuit when one joule of energy is used to move one coulomb of charge between those two points.
The SI unit of Electric Potential Difference is the Volt. One volt is defined as the potential difference between two points in a circuit when one joule of energy is used to move one coulomb of charge between those two points.