A charge of is moved from point A to point B along a surface whose electric potential…

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

A charge of

2\,\mu\text{C}

is moved from point A to point B along a surface whose electric potential everywhere is

150\,\text{V}

. The electric field in the region is non-zero. Which one of the following is the work done by an external agent in this process? (a)

3\times10^{-4}\,\text{J}

(b)

-3\times10^{-4}\,\text{J}

(c)

0\,\text{J}

(d) Cannot be determined without knowing the path length