What is the S.I unit of potential difference?

The potential difference of a unit positive charge is measured in volt. Volt is the SI unit of potential difference.

The potential difference of a unit positive charge is a measure of the work done in moving that charge from one point to another in an electric field. It is measured in volt, which is the SI (International System of Units) unit for potential difference.

A volt (V) is defined as one joule of work done to move a charge of one coulomb between two points in an electric field. Mathematically, this can be expressed as:

1 volt = 1 joule/coulomb (1 V = 1 J/C)

In simpler terms, if 1 joule of energy is required to move a charge of 1 coulomb between two points, the potential difference between those points is said to be 1 volt.

The potential difference is a critical concept in understanding how electric circuits function, as it determines the force driving the flow of electric current. It is typically measured using instruments like a voltmeter, which is connected across two points in a circuit.

This unit is named after Alessandro Volta, an Italian physicist, who is recognized for his contributions to the development of electric power sources.