Force of interaction between two co-axial short electric dipoles whose centres are $R$ distance apart varies as
A$\frac{1}{R}$
B$\frac{1}{R^2}$
C$\frac{1}{R^3}$
D$\frac{1}{R^4}$
Medium
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D$\frac{1}{R^4}$
d (d)
$F=\frac{K 6 P_1 P_2}{r^4}$
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