WB JEE 2023 | Properties of Matter Question 14 | Physics

WB JEE 2023

MCQ (Single Correct Answer)

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WB JEE 2023 Physics - Properties of Matter Question 10 English

As shown in the figure, a liquid is at same levels in two arms of a U-tube of uniform cross-section when at rest. If the U-tube moves with an acceleration 'f' towards right, the difference between liquid heights between two arms of the U-tube will be, (acceleration due to gravity = g)

$$\mathrm{\frac{f}{g}a}$$

$$\mathrm{\frac{g}{f}a}$$

$$\mathrm{a}$$

WB JEE 2023

MCQ (Single Correct Answer)

-0.25

WB JEE 2023 Physics - Properties of Matter Question 9 English

As shown in the figure, a pump is designed as horizontal cylinder with a piston having area A and an outlet orifice having an area 'a'. The piston moves with a constant velocity under the action of force F. If the density of the liquid is $$\rho$$, then the speed of the liquid emerging from the orifice is, (assume $$\mathrm{A} > >$$ a)

$$\sqrt{\frac{F}{\rho A}}$$

$$\frac{a}{A} \sqrt{\frac{F}{\rho A}}$$

$$\sqrt{\frac{2 F}{\rho A}}$$

$$\frac{A}{a} \sqrt{\frac{2 F}{\rho A}}$$

WB JEE 2022

MCQ (Single Correct Answer)

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27 drops of mercury coalesce to form a bigger drop. What is the relative increase in surface energy?

$${3 \over 2}$$

$${2 \over 3}$$

$$-$$$${2 \over 3}$$

WB JEE 2021

MCQ (Single Correct Answer)

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A body of density 1.2 $$\times$$ 10³ kg/m³ is dropped from rest from a height 1 m into a liquid to density 2.4 $$\times$$ 10³ kg/m³. Neglecting all dissipative effects, the maximum depth to which the body sinks before returning to float on the surface is

0.1 m

1 m

0.01 m

2 m

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