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Properties of Matter · Physics · WB JEE

MCQ (Single Correct Answer)
25
Subjective
1
MCQ (More than One Correct Answer)
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MCQ (Single Correct Answer)

1

Which of the following substances has the highest elasticity?

WB JEE 2008
2

A wire is stretched under a force. If the wire suddenly snaps the temperature of the wire

WB JEE 2008
3

A beaker of radius 15 cm is filled with a liquid of surface tension 0.075 N/m. Force across an imaginary diameter on the surface of the liquid is

WB JEE 2008
4

A piece of wood is floating in water. When the temperature of water rises, the apparent weight of the wood will

WB JEE 2008
5

The elastic potential energy of a strained body is

WB JEE 2024
6

A body floats with $$\frac{1}{n}$$ of its volume keeping outside of water. If the body has been taken to height $$\mathrm{h}$$ inside water and released, it will come to the surface after time t. Then

WB JEE 2024
7

Water is filled in a cylindrical vessel of height $$\mathrm{H}$$. A hole is made at height $$\mathrm{z}$$ from the bottom, as shown in the figure. The value of z for which the range (R) of the emerging water through the hole will be maximum for

WB JEE 2024 Physics - Properties of Matter Question 1 English

WB JEE 2024
8

A metal plate of area $$10^{-2} \mathrm{~m}^2$$ rests on a layer of castor oil, $$2 \times 10^{-3} \mathrm{~m}$$ thick, whose coefficient of viscosity is $$1.55 \mathrm{~Ns} \mathrm{~m}^{-2}$$. The approximate horizontal force required to move the plate with a uniform speed of $$3 \times 10^{-2} \mathrm{~ms}^{-1}$$ is

WB JEE 2024
9

WB JEE 2023 Physics - Properties of Matter Question 6 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)

WB JEE 2023
10

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)

WB JEE 2023
11

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

WB JEE 2022
12
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
WB JEE 2021
13
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
WB JEE 2021
14
Under isothermal conditions, two soap bubbles of radii a and b coalesce to form a single bubble of radius c. If the external pressure is p, then surface tension of the bubbles is
WB JEE 2021
15
A steel and a brass wire, each of length 50 cm and cross-sectional area 0.005 cm2 hang from a ceiling and are 15 cm apart. Lower ends of the wires are attached to a light horizontal bar. A suitable downward load is applied to the bar, so that each of the wires extends in length by 0.1 cm. At what distance from the steel wire, the load must be applied?

[Young's modulus of steel = 2 $$ \times $$ 1012 dyne/cm2 and that of brass = 1 $$ \times $$ 1012 dyne/cm2]
WB JEE 2020
16
Which of the following diagrams correctly shows the relation between the terminal velocity vT of a spherical body falling in a liquid and viscosity $$\eta $$ of the liquid?
WB JEE 2020
17
A compressive force is applied to a uniform rod of rectangular cross-section so that its length decreases by 1%. If the Poisson's ratio for the material of the rod be 0.2, which of the following statements is correct?

"The volume approximately ................."
WB JEE 2019
18
A small spherical body of radius r and density $$\rho $$ moves with the terminal velocity v in a fluid of coefficient of viscosity $$\eta $$ and density $$\sigma$$. What will be the net force on the body?
WB JEE 2019
19
The stress along the length of a rod (with rectangular cross-section) is 1% of the Young's modulus of its material. What is the approximate percentage of change of its volume? (Poisson's ratio of the material of the rod is 0.3).
WB JEE 2018
20
What will be the approximate terminal velocity of a rain drop of diameter $${1.8 \times {{10}^{ - 3}}}$$ m, when density of rain water $$ \approx $$ $${1.8 \times {{10}^{ - 5}}}$$ N-sm$$-$$2 (Neglect buoyancy of air)
WB JEE 2018
21
A uniform capillary tube of length l and inner radius r with its upper end sealed is submerged vertically into water. The outside pressure is p0 and surface tension of water is $$\gamma$$. When a length x of the capillary is submerged into water, it is found that water levels inside and outside the capillary coincide. The value of x is
WB JEE 2017
22
A liquid of bulk modulus k is compressed by applying an external pressure such that its density increases by 0.01%. The pressure applied on the liquid is
WB JEE 2017
23
A solid rectangular sheet has two different coefficients of linear expansion $$\alpha$$1 and $$\alpha$$2 along its length and breadth respectively. The coefficient of surface expansion is (for $$\alpha$$1 t << 1, $$\alpha$$2t < <1)
WB JEE 2017
24
A gas bubble of 2 cm diameter rises through a liquid of density 1.75 g cm$$-$$3 with a fixed speed of 0.35 cms$$-$$1. Neglect the density of the gas. The coefficient of viscosity of the liquid is
WB JEE 2016
25
1000 droplets of water having 2 mm diameter each coalesce to form a single drop. Given the surface tension of water is 0.072 Nm$$-$$1. The energy loss in the process is
WB JEE 2016

Subjective

1

A wire of length 5 m is stretched by 1 mm by a force of 1 N. What is the value of energy stored in the wire?

WB JEE 2008

MCQ (More than One Correct Answer)

1

WB JEE 2022 Physics - Properties of Matter Question 13 English

Two wires A and B of same length are made of same material. Load (F) vs. elongation (x) graph for these two wires is shown in the figure. Then which of the following statement(s) is/are true?

WB JEE 2022
2
A drop of water detaches itself from the exit of a tap when ($$\sigma$$ = surface tension of water, $$\rho$$ = density of water, R = radius of the tap exit, r = radius of the drop)
WB JEE 2016
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