MHT CET 2024 16th May Morning Shift | Fluid Mechanics Question 6 | Physics

When capillary is dipped vertically in water, rise of water in capillary is ' h '. The angle of contact is zero. Now the tube is depressed so that its length above the water surface is $\frac{\mathrm{h}}{3}$. The new apparent angle of contact is $\left(\cos 0^{\circ}=1\right)$

$\cos ^{-1}\left(\frac{1}{2}\right)$

$\cos ^{-1}\left(\frac{1}{3}\right)$

$\cos ^{-1}\left(\frac{1}{4}\right)$

$\cos ^{-1}\left(\frac{1}{6}\right)$

MHT CET 2024 15th May Evening Shift

MCQ (Single Correct Answer)

-0

The viscous force between two liquid layers is

radial.

normal to the liquid surface.

tangential to the liquid surface.

neither purely tangential nor purely normal.

MHT CET 2024 15th May Evening Shift

MCQ (Single Correct Answer)

-0

A ball rises to surface at a constant velocity in liquid whose density is 3 times greater than that of the material of the ball. The ratio of force of friction acting on the rising ball to its weight is

$2: 1$

$3: 1$

$4: 1$

$6: 1$

MHT CET 2024 15th May Morning Shift

MCQ (Single Correct Answer)

-0

When a mercury drop of radius ' $R$ ' splits up into 1000 droplets of radius ' $r$ ', the change in surface energy is ( $T=$ surface tension of mercury)

$8 \pi R^2 T$

$16 \pi R^2 T$

$34 \pi \mathrm{R}^2 \mathrm{~T}$

$36 \pi R^2 T$

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