The terminal velocity of a small sphere of radius $a$ in a viscous liquid is proportional to
AIEEE 2012,AIIMS 2004, Easy
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Terminal velocity in a viscous medium is given by:
${V_r} = \frac{{2{a^2}\left( {\rho - \sigma } \right)g}}{{9\eta }}$
$\therefore {V_T} \propto {a^2}$
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