JEE Main 2023 (6 Apr, Shift 1) Physics Q33: Viscosity

Question

A small ball of mass M and density $\rho$ is dropped in a viscous liquid of density $\rho_0$. After some time, the ball falls with a constant velocity. What is the viscous force on the ball ?

Accepted Answer

Option 1: $F=Mg\left(1-\frac{\rho_0}{\rho}\right)$

Answer

$F=Mg\left(1-\frac{\rho_0}{\rho}\right)$

Answer

$F=Mg\left(1+\frac{\rho_0}{\rho}\right)$

Answer

$F=Mg\left(1+\frac{\rho}{\rho_0}\right)$

Answer

$F=Mg(1\pm\rho\rho_0)$

JEE Main 6 April 2023, Shift 1, Physics Q33

Same idea in other shifts