NEET 2023 Manipur | Properties of Matter Question 8 | Physics

The viscous drag acting on a metal sphere of diameter $$1 \mathrm{~mm}$$, falling through a fluid of viscosity $$0.8 \mathrm{~Pa}$$ s with a velocity of $$2 \mathrm{~m} \mathrm{~s}^{-1}$$ is equal to :

$$15 \times 10^{-3} \mathrm{~N}$$

$$30 \times 10^{-3} \mathrm{~N}$$

$$1.5 \times 10^{-3} \mathrm{~N}$$

$$20 \times 10^{-3} \mathrm{~N}$$

NEET 2023

MCQ (Single Correct Answer)

-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 $$=0.03 \mathrm{~N} \mathrm{~m}^{-1}$$ )

$$5.06 \times 10^{-4} \mathrm{~J}$$

$$3.01 \times 10^{-4} \mathrm{~J}$$

$$50.1 \times 10^{-4} \mathrm{~J}$$

$$30.16 \times 10^{-4} \mathrm{~J}$$

NEET 2023

MCQ (Single Correct Answer)

-1

The venturi-meter works on :

Bernoulli's principle

The principle of parallel axes

The principle of perpendicular axes

Huygen's principle

NEET 2023

MCQ (Single Correct Answer)

-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 :

$$W / A$$

$$W / 2 A$$

Zero

$$2 W / A$$

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