Q.54

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Found in: Page 230

### Physics for Scientists and Engineers: A Strategic Approach with Modern Physics

Book edition 4th
Author(s) Randall D. Knight
Pages 1240 pages
ISBN 9780133942651

# An electric dipole consists of two equal but opposite electric charges, +q and -q, separated by a small distance d. If another charge Q is distance x from the center of the dipole, in the plane perpendicular to the line between +q and -q, and if x W d, the dipole exerts an electric force on charge Q, where K is a constant. How much work does the electric force do if charge Q moves from distance ?

Work done by electric force is

See the step by step solution

## Step 1: Content Introduction

The work done by variable force is,

Here, is the force, is small displacement.

## Step 2: Content Explanation

Consider dipole exerts an electric force is

use formula to find work done by force F using distance to distance.

Use power rule of integral,

Hence work done by electric force is