A spherical ball is dropped in a long column of a highly viscous liquid. The curve in the graph shown, which represents the speed of the ball ($$v$$) as a function of time ($$t$$) is:

1. $$D$$
2. $$A$$
3. $$B$$
4. $$C$$
Subtopic: Â Viscosity |
Â 71%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh

The correct statement about the variation of viscosity of fluids with an increase in temperature is:

 1 viscosity of gases decreases. 2 viscosity of both liquids and gases increases. 3 viscosity of liquids increases. 4 viscosity of liquids decreases.
Subtopic: Â Viscosity |
Â 73%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

The velocity of a small ball of mass $$M$$ and density $$d$$, when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is $$d\over 2$$ then the viscous force acting on the ball will be:

 1 $$\frac{3Mg}{2}$$ 2 $$2Mg$$ 3 $$\frac{Mg}{2}$$ 4 $$Mg$$
Subtopic: Â Viscosity |
Â 60%
From NCERT
NEET - 2021
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Two small spherical metal balls, having equal masses, are made from materials of densities $$\rho_1$$ and $$\rho_2$$ such that ${}_{}$$$\rho_1=8\rho_2$$and having radii of $$1$$ mm and $$2$$ mm, respectively. They are made to fall vertically (from rest) in a viscous medium whose coefficient of viscosity equals $$\eta$$ and whose density is $$0.1\rho_2$$${}_{}$. The ratio of their terminal velocities would be:

 1 $$\frac{79}{72}$$ 2 $$\frac{19}{36}$$ 3 $$\frac{39}{72}$$ 4 $$\frac{79}{36}$$

Subtopic: Â Viscosity |
Â 78%
From NCERT
NEET - 2019
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NEET 2023 - Target Batch - Aryan Raj Singh
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