- #1

vcsharp2003

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- 177

- Homework Statement
- I came across the following definition in my book for electrical potential energy, which is highly confusing. The definition is as pasted below.

How can the charge move through a displacement if external force is equal and opposite to the electrical force i.e. qE and -qE forces when applied to a charge will not make it move but produce equilibrium?

Only if the applied force is -(qE +f) where f is some arbitrary small force will the charge move and have some displacement.

- Relevant Equations
- ##\vec F = q \vec E## which gives us the force on a charge q placed at a point in an electric field

##W = \vec F \cdot \vec s ## which is the work done by a force

If the book had said that electrical potential energy is the negative of work done by electrical force on a charge, then the definition would be very clear and easy to understand. So, why should the book give this confusing definition instead.

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