1
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

The speed of a ball of radius $$2 \mathrm{~cm}$$ in a viscous liquid is $$20 \mathrm{~cm} / \mathrm{s}$$. What will be the speed of a ball of radius $$1 \mathrm{~cm}$$ in same liquid?

A
10 cm/s
B
4 cm/s
C
5 cm/s
D
8 cm/s
2
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

Water rises to a height of $$2 \mathrm{~cm}$$ in a capillary tube. If cross-sectional area of the tube is reduced to $$\frac{1}{16}^{\text {th }}$$ of initial area then water will rise to a height of

A
4 cm
B
8 cm
C
12 cm
D
16 cm
3
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

Work done in increasing the size of a soap bubble from radius of $$3 \mathrm{~cm}$$ to $$5 \mathrm{~cm}$$ in millijoule is nearly (surface tension of soap solution $$=0.03 \mathrm{~Nm}^{-1}$$)

A
$$0.4 \pi$$
B
$$0.2 \pi$$
C
$$4 \pi$$
D
$$2 \pi$$
4
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

A ball rises to the surface of a liquid with constant velocity. The density of the liquid is four times the density of the material of the ball. The viscous force of the liquid on the rising ball is greater than the weight of the ball by a factor of

A
4
B
3
C
2
D
5
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