1
MHT CET 2022 11th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

The excess pressure inside a soap bubble of radius $$2 \mathrm{~cm}$$ is 50 dyne/cm$$^2$$. The surface tension is

A
50 dyne/cm
B
60 dyne/cm
C
75 dyne/cm
D
25 dyne/cm
2
MHT CET 2021 24th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

'n' small drops of same size fall through air with constant velocity $$5 \mathrm{~cm} / \mathrm{s}$$. They coalesce to form a big drop. The terminal velocity of the big drop is

A
$$7 \mathrm{n}^{2 / 3} \mathrm{~cm} / \mathrm{s}$$
B
$$5 \mathrm{n}^{2 / 3} \mathrm{~cm} / \mathrm{s}$$
C
$$3 \mathrm{n}^{2 / 3} \mathrm{~cm} / \mathrm{s}$$
D
$$9 \mathrm{n}^{2 / 3} \mathrm{~cm} / \mathrm{s}$$
3
MHT CET 2021 24th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Pressure inside two soap bubbles are 1.01 atm and 1.03 atm. The ratio between their volumes is (Pressure outside the soap bubble is 1 atmosphere)

A
9 : 1
B
27 : 1
C
81 : 1
D
3 : 1
4
MHT CET 2021 24th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

If the work done in blowing a soap bubble of volume '$$\mathrm{V}$$' is '$$\mathrm{W}$$', then the work done in blowing a soap bubble of volume '$$2 \mathrm{~V}$$' will be

A
$$2 \mathrm{~W}$$
B
$$(4)^{1 / 3} \mathrm{~W}$$
C
$$\mathrm{W}$$
D
$$\sqrt{2} \mathrm{~W}$$
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