1
MHT CET 2023 13th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The fundamental frequency of a sonometer wir carrying a block of mass '$$M$$' and density '$$\rho$$' is '$$n$$' Hz. When the block is completely immerse in a liquid of density '$$\sigma$$' then the new frequency will be

A
$$\mathrm{n}\left[\frac{\rho-\sigma}{\rho}\right]^{\frac{1}{2}}$$
B
$$\mathrm{n}\left[\frac{\rho-\sigma}{\sigma}\right]^{\frac{1}{2}}$$
C
$$\mathrm{n}\left[\frac{\rho}{\rho-\sigma}\right]^{\frac{1}{2}}$$
D
$$n\left[\frac{\sigma}{\rho-\sigma}\right]^{\frac{1}{2}}$$
2
MHT CET 2023 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Eight small drops of mercury each of radius '$$r$$', coalesce to form a large single drop. The ratio of total surface energy before and after the change is

A
2 : 1
B
1 : 1
C
1 : 4
D
1 : 8
3
MHT CET 2023 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A spherical metal ball of radius '$$r$$' falls through viscous liquid with velocity '$$\mathrm{V}$$'. Another metal ball of same material but of radius $$\left(\frac{r}{3}\right)$$ falls through same liquid, then its terminal velocity will be

A
$$\frac{\mathrm{V}}{3}$$
B
$$\frac{V}{4}$$
C
$$\frac{\mathrm{V}}{6}$$
D
$$\frac{V}{9}$$
4
MHT CET 2023 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Select the WRONG statement from the following. In a streamline flow

A
velocity of a fluid at a given point is never constant.
B
velocity is smaller than critical velocity.
C
layers are always parallel.
D
the particles do not move in random direction.
MHT CET Subjects
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