Chapter 13, Problem 16E

(a)

Interpretation Introduction

Interpretation:

The energy of interaction should be calculated.

Concept Introduction :

Coulomb’s law

  $\text{V = }\frac{Q_1{Q}_2}{4\pi {\epsilon }_{0}r}$

  $\begin{array}{l}V\text{ - Energy of interaction}\\ \text{Q - charge}\\ {\epsilon }_0\text{ - permitivity of free space}\\ \text{r - distance between two charges}\end{array}$

(b)

Interpretation Introduction

Interpretation:

The energy of interaction should be calculated.

Concept Introduction :

Coulomb’s law

  $\text{V = }\frac{Q_1{Q}_2}{4\pi {\epsilon }_{0}r}$

  $\begin{array}{l}V\text{ - Energy of interaction}\\ \text{Q - charge}\\ {\epsilon }_0\text{ - permitivity of free space}\\ \text{r - distance between two charges}\end{array}$