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Physics · Electrostatic Potential
हिन्दीFor a point dipole, the electric potential falls off at large distance as \( 1/r^2 \), whereas for a single point charge it falls off as \( 1/r \). What is the potential decay power of distance for a quadrupole?
Correct answer · Option 3
\( 1/r^3 \) / \( 1/r^3 \)
Explanation
Multipole expansion shows that monopole potential falls as \( r^{-1} \), dipole as \( r^{-2} \), and quadrupole as \( r^{-3} \).
