1
MHT CET 2024 15th May Evening Shift
MCQ (Single Correct Answer)
+1
-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

A
$2: 1$
B
 $3: 1$
C
$4: 1$
D
$6: 1$
2
MHT CET 2024 15th May Morning Shift
MCQ (Single Correct Answer)
+1
-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)

A
$8 \pi R^2 T$
B
$16 \pi R^2 T$
C
$34 \pi \mathrm{R}^2 \mathrm{~T}$
D
$36 \pi R^2 T$
3
MHT CET 2024 15th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The angle of contact between glass and water is $0^{\circ}$ and water rises in a glass capillary upto 6 cm (Surface tension of water is T). Another liquid of surface tension ' $2 \mathrm{~T}^{\prime}$ ', angle of contact $60^{\circ}$ and relative density 2 will rise in the same capillary up to $\left(\cos 0^{\circ}=1, \cos 60^{\circ}=0.5\right)$

A
1.5 cm
B
2 cm
C
3 cm
D
4.0 cm
4
MHT CET 2024 15th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two capillary tubes A and B of the same internal diameter are kept vertically in two different liquids whose densities are in the ratio $4: 3$. If the surface tensions of these two liquids are in the ratio $6: 5$, then the ratio of rise of liquid in capillary A to that in B is (assume their angles of contact are nearly equal)

A
$10: 9$
B
$9: 10$
C
$7:10$
D
$10: 7$
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