An external agent does of work in moving a charge from point S to point T

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

Problem

An external agent does

+8\,\text{J}

of work in moving a

+4\,\text{C}

charge from point S to point T. What work will the same agent have to do to move a

-4\,\text{C}

charge from S to T along the same path? (a)

+8\,\text{J}

(b)

-4\,\text{J}

(c)

-8\,\text{J}

(d)

+4\,\text{J}