# Will the work be positive or negative if i move a positive test charge away from a positive point charge?

Assume we have apositive source charge And near it a positive test charge And we moved this test charge away from the source charge to a certain point, will the external work be positive or negative

• Hint: work done along path $C$ is given by $W = \int_{C} \vec{F} \cdot d\vec{s}$. In your case $\vec{F}$ is given by Coulomb's law, and $d\vec{s}$ is the infinitesimal displacement. – K_inverse Sep 10 '18 at 1:01