The electrostatic potential at any point defined as the work done in bringing a unit positive charge from infinity to that point. The S.I. unit of electrostatic potential isvolt. It is denoted by symbol V.
The potential difference between two points A and B in an electric field may be defined as the amount of work done in moving a unit positive charge from point A to point B.
Potential Difference =
The S.I. unit of potential difference is Volt. Potential difference is a scalar quantity. The potential difference is measured with the help of an instrument called Voltmeter. It should be noted that in order to measure the potential difference of a conductor the voltmeter is connected in parallel circuit with the two ends of the conductor as shown in figure.
The potential difference between two points in an electric field is said to be 1 volt if 1 Joule of work is done in bringing 1 coulomb of positive charge from one point to another.
1 Volt =
Test Your Understanding and Answer These Questions:
- What is electrostatic potential?
- What is potential difference?
- Define 1 volt?
- Name the instrument by which potential difference is measured.
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