Easy MCQ +4 / -1 PYQ · JEE Mains 2022

The terminal velocity (vt) of the spherical rain drop depends on the radius (r) of the spherical rain drop as :

  1. A r<sup>1/2</sup>
  2. B r
  3. C r<sup>2</sup> Correct answer
  4. D r<sup>3</sup>

Solution

<p>$6\pi \eta {v_t}r = {4 \over 3}\pi {r^3}(\rho - \sigma )g$</p> <p>$\Rightarrow {v_t} = C{r^2}$ where C is a constant</p> <p>or ${v_t} \propto {r^2}$</p>

About this question

Subject: Physics · Chapter: Properties of Solids and Liquids · Topic: Elasticity

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