MHT CET 2023 10th May Evening Shift | Fluid Mechanics Question 26 | Physics

A metal sphere of mass '$$m$$' and density '$$\sigma_1$$' falls with terminal velocity through a container containing liquid. The density of liquid is '$$\sigma_2$$'. The viscous force acting on the sphere is

$$m g\left(1 + \frac{\sigma_2}{\sigma_1}\right)$$

$$m g\left(1-\frac{\sigma_1}{\sigma_2}\right)$$

$$\quad \mathrm{mg}\left(1-\frac{\sigma_2}{\sigma_1}\right)$$

$$m g\left(1+\frac{\sigma_1}{\sigma_2}\right)$$

MHT CET 2023 10th May Morning Shift

MCQ (Single Correct Answer)

-0

Water flows through a horizontal pipe at a speed '$$\mathrm{V}$$'. Internal diameter of the pipe is '$$\mathrm{d}$$'. If the water is coming out at a speed '$$V_1$$' then the diameter of the nozzle is

$$\mathrm{d \sqrt{\frac{V_1}{V}}}$$

$$\mathrm{d \sqrt{\frac{V}{V_1}}}$$

$$\frac{\mathrm{dV}}{\mathrm{V}_1}$$

$$\frac{\mathrm{V}_1}{\mathrm{dV}}$$

MHT CET 2023 10th May Morning Shift

MCQ (Single Correct Answer)

-0

Three liquids have same surface tension and densities $$\rho_1, \rho_2$$, and $$\rho_3\left(\rho_1>\rho_2>\rho_3\right)$$. In three identical capillaries rise of liquid is same. The corresponding angles of contact $$\theta_1, \theta_2$$ and $$\theta_3$$ are related as

$$\theta_1>\theta_2>\theta_3$$

$$\theta_1>\theta_3>\theta_2$$

$$\theta_1<\theta_2<\theta_3$$

$$\theta_1=\theta_2=\theta_3$$

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