# What is the meaning of infinity in potential difference???

infinite is considered as reference point in case of electrostatics. It is more like an imaginary point where the net charge =0, so the potential at infinite is zero. The concept of infinite is used to define work done , when a unit positive charge is moved from infinite to a specific point.

as we know,

(work done) /charge = (potential difference)

$\raisebox{1ex}{$W$}\!\left/ \!\raisebox{-1ex}{$q$}\right.={V}_{b}-{V}_{a}\phantom{\rule{0ex}{0ex}}where{V}_{a}=potentialatinfinite=0\phantom{\rule{0ex}{0ex}}and{V}_{b}=potentialatanyspecificpoint$

Basically, as the potential at infinite is zero, we can directly get the potential of a specific point from this equation.

so, infinity is considered as a reference place that is fixed

Regards,

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