MHT CET 2021 21th September Evening Shift | Fluid Mechanics Question 106 | Physics

Water rises upto a height $$10 \mathrm{~cm}$$ in a capillary tube. It will rise to a height which is much more than $$10 \mathrm{~cm}$$ in a very long capillary tube if the apparatus is kept.

on the surface of the moon.

at the north pole.

in a lift moving up with an acceleration.

on the equator.

MHT CET 2021 21th September Evening Shift

MCQ (Single Correct Answer)

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A big water drop is divided into 8 equal droplets. $$\Delta \mathrm{P}_{\mathrm{s}}$$ and $$\Delta \mathrm{P}_{\mathrm{B}}$$ be the excess pressure inside a smaller and bigger drop respectively. The relation between $$\Delta \mathrm{P}_{\mathrm{s}}$$ and $$\Delta \mathrm{P}_{\mathrm{B}}$$ is

$$\Delta P_B=\Delta P_S$$

$$\Delta \mathrm{P}_{\mathrm{B}}=\frac{1}{2} \Delta \mathrm{P}_{\mathrm{S}}$$

$$\Delta P_B=\frac{1}{4} \Delta P_S$$

$$\Delta P_B=2 \Delta P_S$$

MHT CET 2021 21th September Morning Shift

MCQ (Single Correct Answer)

-0

The surface tension of most of the liquid decreases with rise in

viscosity of the liquid

diameter of capillary

temperature of the liquid

density of the liquid

MHT CET 2021 21th September Morning Shift

MCQ (Single Correct Answer)

-0

The velocity of a small ball of mass '$$M$$' and density '$$\mathrm{d}_1$$' when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is '$$\mathrm{d}_2$$', the viscous force acting on the ball is ( $$\mathrm{g}=$$ acceleration due to gravity)

$$\mathrm{Mg} \frac{\mathrm{d}_1}{\mathrm{~d}_2}$$

$$\mathrm{Mgd}_1 \mathrm{~d}_2$$

$$\operatorname{Mg}\left(d_1-d_2\right)$$

$$\operatorname{Mg}\left(1-\frac{\mathrm{d}_2}{\mathrm{~d}_1}\right)$$

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