Question

Define electric potential difference. State
and define the SI unit of electric potential
difference.​

Answer 1

The electrical potential difference is defined as the amount of work done to carrying a unit charge from one point to another in an electric field. In other words, the potential difference is defined as the difference in the electric potential of the two charged bodies.

Answer 2

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Definition: The electric potential difference between two points in an electric field is defined as the work done per unit charge by an external agent against the electric force in moving anni finitesimal positive charge from one point to the other without acceleration.

The SI unit of electric potential difference is the volt (symbol, V), named after Italian physicist Alessandro Giuseppe Anastasio Volta (1745-1827).

Definition : The electric potential difference between two points in an electric field is oneolt if the work done per unit charge by anexternal agent against the electric force inmoving an infinitesimal positive charge without acceleration from one point to the other is one joule per coulomb.

[ Notes : (1) It is more correct to speak about potential difference AV between two points than just the potentialV at a given point because the latter implies a choice of zero reference potential. The choice is one of convenience and we may choose the zero referenceπpotential for a point at infinity or at some other location convenient for the problem as is doneπfor potential energy. (2) In SI, the fundamental physical quantity being the current (and not charge), one volt is defined as the potential difference between two points on a conductor carrying a current of one ampere when the power dissipated is one watt. ]