Question

Name and define the S.I. unit of “potential difference” between two points in an electric circuit carrying current. Also express it in terms of the S.I. unit of work and charge.

Answer 1

The S.I. unit of potential difference is the volt (V).

One volt is the potential difference between two points when one coloumb of charge is moved with one joule of labor.

Potential difference = `"Work done"/"Charge"`

V = `W/Q`

∴ 1 volt = 1 Joule/1Coloumb