Two point dipoles of dipole moment \[{{\vec{p}}_{1}}\]and \[{{\vec{p}}_{2}}\]are at a distance x from each other and \[{{\vec{p}}_{1}}||{{\vec{p}}_{2}}.\] The force between the dipoles is:

\[\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{6{{p}_{1}}{{p}_{2}}}{{{x}^{4}}}\]

\[\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{4{{p}_{1}}{{p}_{2}}}{{{x}^{4}}}\]

\[\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{3{{p}_{1}}{{p}_{2}}}{{{x}^{4}}}\]

\[\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{8{{p}_{1}}{{p}_{2}}}{{{x}^{4}}}\,\]

Two point dipoles of dipole moment \[{{\vec{p}}_{1}}\]and \[{{\vec{p}}

1.	Two point dipoles of dipole moment \[{{\vec{p}}_{1}}\]and \[{{\vec{p}}_{2}}\]are at a distance x from each other and \[{{\vec{p}}_{1}}\|\|{{\vec{p}}_{2}}.\] The force between the dipoles is:
A.	\[\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{4{{p}_{1}}{{p}_{2}}}{{{x}^{4}}}\]
B.	\[\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{3{{p}_{1}}{{p}_{2}}}{{{x}^{4}}}\]
C.	\[\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{6{{p}_{1}}{{p}_{2}}}{{{x}^{4}}}\]
D.	\[\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{8{{p}_{1}}{{p}_{2}}}{{{x}^{4}}}\,\]
Answer» C. \[\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{6{{p}_{1}}{{p}_{2}}}{{{x}^{4}}}\]