Question

Why is work done by electrostatic force negative of external force?

Answer 1

Answer:

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Explanation:

As derivative of potentiol nergy is negative of force applied

Answer 2

The work done by the external force is equal to the change in the electrostatic potential energy of the particle in the external field. ... The change in potential energy is proportional to the charge q. Its sign depends on whether the charge is positive or negative.