State and define the unit of potential difference.

unit of potential difference is volt ...and one volt is defined as the amount of work done to bring unit positive charge from one point to another point in magnetic field.

Potential difference b/w two points in an electric circuit is defined as the amount of work done in moving a unit charge from one point to the another Unit is:- Potential difference(V)=work done(W) by quantity of charged moved(Q)

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Potential difference:: The amount of work done in moving a unit positive charge from one point to another in the same field. Unit::volt one volt is said to be done when 1joule of work is done in moving 1coulomb of charge.