Electrostatics Question 710
Question: 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:
Options:
A) $ \frac{1}{4\pi {\varepsilon _{0}}}\frac{4p _{1}p _{2}}{x^{4}} $
B) $ \frac{1}{4\pi {\varepsilon _{0}}}\frac{3p _{1}p _{2}}{x^{4}} $
C) $ \frac{1}{4\pi {\varepsilon _{0}}}\frac{6p _{1}p _{2}}{x^{4}} $
D) $ \frac{1}{4\pi {\varepsilon _{0}}}\frac{8p _{1}p _{2}}{x^{4}} $
Show Answer
Answer:
Correct Answer: B
Solution:
[b] Force of interaction $ F=\frac{1}{4\pi {\varepsilon _{0}}}.\frac{3p _{1}p _{2}}{x^{4}} $
