WB JEE 2023 | Properties of Matter Question 11 | Physics

WB JEE 2023

MCQ (Single Correct Answer)

-0.25

WB JEE 2023 Physics - Properties of Matter Question 5 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)

-0.25

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)

-0.25

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

WB JEE 2021

MCQ (Single Correct Answer)

-0.25

Two solid spheres S₁ and S₂ of same uniform density fall from rest under gravity in a viscous medium and after sometime, reach terminal velocities v₁ and v₂, respectively. If ratio of masses $${{{m_1}} \over {{m_2}}} = 8$$, then $${{{v_1}} \over {{v_2}}}$$ will be equal to

$${1 \over 2}$$

$${1 \over 4}$$

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