WBJEE SERIES Physics
Mechanical Properties Of Fluid
16 previous year questions.
Volume: 16 Ques
Yield: Medium
High-Yield Trend
2
2023 1
2019 1
2018 1
2017 2
2015 2
2014 1
2013 2
2012 2
2011 1
2010 1
2008 Chapter Questions 16 MCQs
01
PYQ 2008
medium
physics ID: wbjee-20
A beaker of radius is filled with a liquid of surface tension . Force across an imaginary diameter on the surface of the liquid is
1
2
3
4
02
PYQ 2010
medium
physics ID: wbjee-20
Two solid spheres of same metal but of mass and fall simultaneously on a viscous liquid and their terminal velocities are and , then value of is
1
16
2
8
3
4
4
2
03
PYQ 2011
medium
physics ID: wbjee-20
A body floats in water with of its volume outside water. When the same body floats in an oil, of its volume remains outside oil. The relative density of oil is
1
2
3
4
04
PYQ 2011
medium
physics ID: wbjee-20
An object weights , in a liquid of density and that in liquid of density is The density of the object is
1
2
3
4
05
PYQ 2012
medium
physics ID: wbjee-20
Water is flowing through a very narrow tube. The velocity of water below which the flow remains a streamline flow is known as
1
Relative velocity
2
Terminal velocity
3
Critical velocity
4
Particle velocity
06
PYQ 2012
medium
physics ID: wbjee-20
A body when fully immersed in a liquid of specific gravity weighs . The same body when fully immersed in water weighs . The mass of the body is
1
36 g
2
48 g
3
64 g
4
80 g
07
PYQ 2013
medium
physics ID: wbjee-20
Water is flowing in streamline motion through a horizontal tube. The pressure at a point in the tube is where the velocity of flow is . At another point, where the pressure is , the velocity of flow is [density of water = ]
1
2
3
4
08
PYQ 2014
medium
physics ID: wbjee-20
A small metal sphere of radius is falling with a velocity through a vertical column of a viscous liquid. If the coefficient of viscosity of the liquid is then the sphere encounters an opposing force of
1
2
3
4
09
PYQ 2014
medium
physics ID: wbjee-20
To determine the composition of a bimetallic alloy, a sample is first weighed in air and then in water. These weights are found to be and respectively. If the densities of the two constituent metals are and respectively, then the weight of the first metal in the sample is (where is the density of water)
1
2
3
4
10
PYQ 2015
medium
physics ID: wbjee-20
A long capillary tube is dipped vertically in water and the liquid rises upto . If the entire system is kept in a freely falling platform, the length of water column in the tube will be
1
5 cm
2
10 cm
3
15 cm
4
20 cm
11
PYQ 2015
medium
physics ID: wbjee-20
A hollow sphere of external radius and thickness is made of a metal of density , sphere will float in water if
1
2
3
4
12
PYQ 2017
medium
physics ID: wbjee-20
A uniform capillary tube of length and inner radius with its upper end sealed is submerged vertically into water. The outside pressure is and surface tension of water is . When a length of the capillary is submerged into water, it is found that water levels inside and outside the capillary coincide. The value of is
1
2
3
4
13
PYQ 2018
easy
physics ID: wbjee-20
What will be the approximate terminal velocity of a rain drop of diameter , when density of rain water and the co-efficient of viscosity of air ? (Neglect buoyancy of air).
1
2
3
4
14
PYQ 2019
medium
physics ID: wbjee-20
A small spherical body of radius r and density ? moves with the terminal velocity v in a fluid of coefficient of viscosity and density . What will be the net force on the body ?
1
2
3
Zero
4
Infinity
15
PYQ 2023
easy
physics ID: wbjee-20
As shown in the figure, a pump is designed as a horizontal cylinder with a piston having area A and an outer 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 Ο, then the speed of liquid emerging from the orifice is(assume A>>a)
1
2
3
4
16
PYQ 2023
medium
physics ID: wbjee-20
As shown in the figure, a liquid is at the 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 the right,the difference in liquid heights between the two arms of the U-tube will be,(acceleration due to gravity=g)
1
2
3
a
4
0