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Question

If momentum [P], area $[\mathrm{A}]$ and time $[\mathrm{T}]$ are taken as fundamental quantities, then the dimensional formula for coefficient of viscosity is :

$\left[\mathrm{P} \,\mathrm{A}^{-1} \mathrm{~T}^{0}\right]$
$\left[\mathrm{P} \,\mathrm{A}\mathrm{~T}^{-1}\right]$
$\left[\mathrm{P}\,\mathrm{A}^{-1} \mathrm{~T}\right]$
$\left[\mathrm{P} \,\mathrm{A}^{-1} \mathrm{~T}^{-1}\right]$

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