Electric potential $(ϕ)$ of a quadrupole varies with distance 'r' on its axis as :-
$ϕ : r^{- 1}$
$ϕ : r^{- 2}$
$ϕ : r^{- 3}$
$ϕ : r^{3 / 2}$

ϕ : r^{- 2}

ϕ : r^{- 1}

ϕ : r^{- 3}

ϕ : r^{3 / 2}

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Electric potential (ϕ) of a quadrupole varies with distance 'r' on its axis as :-ϕ:r−1ϕ:r−2ϕ:r−3ϕ:r3/2

Electric potential $(ϕ)$ of a quadrupole varies with distance 'r' on its axis as :-
$ϕ : r^{- 1}$
$ϕ : r^{- 2}$
$ϕ : r^{- 3}$
$ϕ : r^{3 / 2}$