A small steel ball of radius r is allowed to fall under gravity... | JEE | NEET | MHT-CET | MCQ

00:00 A small steel ball of radius r is allowed to fall under gravity through a column of a viscous liquid of coefficient of viscosity n. After some time the velocity of the ball attains a constant value known as terminal velocity v7. The terminal velocity depends on (i) the mass of the ball m, (ii) η, (iii) r and (iv) acceleration due to gravity g. Which of the following relations is dimensionally correct
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