The S.I. unit of potential difference is Volt (V) or joule per coulomb.
The potential difference between two points is said to be 1 volt if work done in transferring 1 coulomb of charge from one point to the other point is 1 joule.
The S.I. unit of potential difference is Volt (V) or joule per coulomb.
The potential difference between two points is said to be 1 volt if work done in transferring 1 coulomb of charge from one point to the other point is 1 joule.