Question

Two point dipoles of dipole moment ${\overrightarrow{p}}_1$ and ${\overrightarrow{p}}_2$ are at a distance $x$ from each other and ${\overrightarrow{p}}_1\parallel {\overrightarrow{p}}_2$. The force between the dipoles is

• A. $\frac{1}{4\pi {\epsilon }_0}\frac{4p_1{p}_2}{x^4}$
• B. $\frac{1}{4\pi {\epsilon }_0}\frac{3p_1{p}_2}{x^3}$
• C. $\frac{1}{4\pi {\epsilon }_0}\frac{6p_1{p}_2}{x^4}$
• D. $\frac{1}{4\pi {\epsilon }_0}\frac{8p_1{p}_2}{x^4}$

Answer 1

Answer: (C)