Physics

Physics

Problem

Two point dipoles of dipole moment

\vec{p}_1

and

\vec{p}_2

are at a distance

x

from each other and

\vec{p}_1 \parallel \vec{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}

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