1
NEET 2023
+4
-1

The amount of energy required to form a soap bubble of radius $$2 \mathrm{~cm}$$ from a soap solution is nearly: (surface tension of soap solution $$=0.03 \mathrm{~N} \mathrm{~m}^{-1}$$ )

A
$$5.06 \times 10^{-4} \mathrm{~J}$$
B
$$3.01 \times 10^{-4} \mathrm{~J}$$
C
$$50.1 \times 10^{-4} \mathrm{~J}$$
D
$$30.16 \times 10^{-4} \mathrm{~J}$$
2
NEET 2023
+4
-1

The venturi-meter works on :

A
Bernoulli's principle
B
The principle of parallel axes
C
The principle of perpendicular axes
D
Huygen's principle
3
NEET 2023
+4
-1

Let a wire be suspended from the ceiling (rigid support) and stretched by a weight $$W$$ attached at its free end. The longitudinal stress at any point of cross-sectional area $$A$$ of the wire is :

A
$$W / A$$
B
$$W / 2 A$$
C
Zero
D
$$2 W / A$$
4
NEET 2022 Phase 2
+4
-1

Two copper vessels A and B have the same base area but of different shapes. A takes twice the volume of water as that B requires to fill upto a particular common height. Then the correct statement among the following is :

A
Vessel B weighs twice that of A.
B
Pressure on the base area of vessels A and B is same.
C
Pressure on the base area of vessels A and B is not same.
D
Both vessels A and B weigh the same.
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