JEE Questions for Physics Mechanical Properties Of Fluids Quiz 4 - MCQExams.com

5 meter long wire is fixed to the ceiling. A weight of 10 kg is hung at the lower end and is 1 meter above the four. The wire was elongated by 1 mm. What is the stored in the wire due to stretching ?
  • Zero
  • 0.05 Joule
  • 100 Joule
  • 500 Joule
A wire suspended vertically from one of its ends is stretched by attaching a weight of 200 N to the lower and. The weight stretches the wire by 1 mm. Then what is the elastic energy stored in the wire?
  • 0.1 J
  • 0.2 J
  • 10 J
  • 20 J
When a 4 kg mass is hung vertically on a light spring that obeys Hook's law, the spring stretches by 2 cm what will be the work required to be done by an external agent in stretching this spring by 5 cm ?
  • 4.900 Joule
  • 2.450 Joule
  • 0.495 Joule
  • 0.245 Joule
The isothermal elasticity of a gas is equal to....................
  • Density
  • Volume
  • Pressure
  • Specific heat
What is the ratio of the adiabatic to isothermal elasticities of a triatomic gas ?
  • 3/4
  • 4/3
  • 1
  • 5/3
The comprehensibility of water 4 × 10–5 per unit atmospheric pressure. The decrease in volume of 100 cubic centimeter of water under a pressure of 100 atmosphere will be................
  • 4 × 10–4 CC
  • 4 × 10–5 CC
  • 0.025 CC
  • 0.004 CC
The bulk modulus of an ideal gas at constant temperature.........
  • is equal to its volume V
  • is equal to P/2
  • is equal to its pressure P
  • cannot be determined
The Poisson's ratio can not have the value...........
  • 0.7
  • 0.2
  • 0.1
  • 0.5
For a given material the Young's modulus is 2.4 times that of rigidity modulus. What is its Poisson's ratio ?
  • 2.4
  • 1.2
  • 0.4
  • 0.2
The lower surface of a cube is fixed. On its upper surface is applied at an angle of 30o from its surface. What will be the change of the type ?
  • shape
  • size
  • none
  • shape & size
What is the possible value of poison's ratio ?
  • 1
  • 0.9
  • 0.8
  • 0.4
The value of force constant between the applied elastic force F and displacement will be
Physics-Mechanical Properties of Fluids-78529.png

  • Physics-Mechanical Properties of Fluids-78530.png
  • 2)
    Physics-Mechanical Properties of Fluids-78531.png

  • Physics-Mechanical Properties of Fluids-78532.png

  • Physics-Mechanical Properties of Fluids-78533.png
A wire is stretched to double the length which of the following is false in this context?
  • Its volume increased
  • Its longitudinal strain is I
  • Stress = Young's modlus
  • Stress = 2x Young's modulus
When 100 N tensile force is applied to a rod of 10-6 m2 cross-sectional area, its length increases by 1% so young's modulus of material is..........
  • 1012 Pa
  • 1011 Pa
  • 1010 Pa
  • 102 Pa
A composite wire is made by joining ends of two wires of equal dimensions, one of copper and the other of steel. When a weight is attached to its end the ratio of increase in their length is .........
Physics-Mechanical Properties of Fluids-78534.png
  • 20.7
  • 10.7
  • 7:20
  • 1:7
A rubber ball when taken to the bottom of a 100 m deep take decrease in volume by 1% Hence, the bulk modulus of rubber is............
Physics-Mechanical Properties of Fluids-78535.png
  • 106 Pa
  • 108 Pa
  • 107 Pa
  • 109 Pa
Young's modulus of a rigid body is
  • 0
  • 1
  • ∞
  • 0.5
Pressure on an object increases from 1.01 × 105 Pa to 1.165 × 105 Pa He volume decrease by 10% at constant temperature. Bulk modulus of material is........
  • 1.15 × 105 Pa
  • 51.2 × 105 Pa
  • 102.4 × 105 Pa
  • 204.8 × 105 Pa
Cross–sectional area of wire of length L is A. Young's modulus of material is Y. If this wire acts as a spring what is the value of force constant ?

  • Physics-Mechanical Properties of Fluids-78536.png
  • 2)
    Physics-Mechanical Properties of Fluids-78537.png

  • Physics-Mechanical Properties of Fluids-78538.png

  • Physics-Mechanical Properties of Fluids-78539.png
Writing on black board with a pieace of chalk is possible by the property of
  • Adhesive force
  • Cohesive force
  • Surface force
  • Viscosity
When there is no external force, the shape of liquid drop is determined by
  • Surface tension of liquid
  • Density of Liquid
  • Viscosity of liquid
  • Tempreture of air only
Soap helps in cleaning because
  • chemicals of soap change
  • It increase the surface tension of the solution
  • It absorbs the dirt
  • It lowers the surface tension of the solution
A square frame of side L is dipped in a liquid on taking out a membrane is formed if the surface tension of the liquid is T, the force acting on the frame will be.
  • 2 TL
  • 4 TL
  • 8 TL
  • 10 TL
Surface tension of a liquid is found to be infuenced by
  • It increases with the increase of temperature
  • Nature of the liquid in contact
  • Presence of soap that increase it
  • Its variation with the concentration of the liquid
The surface tension of a liquid is 5 N/m. If a thin film of the area 0.02 m2 is formed on a loop, then its surface energy will be

  • Physics-Mechanical Properties of Fluids-78541.png
  • 2)
    Physics-Mechanical Properties of Fluids-78542.png

  • Physics-Mechanical Properties of Fluids-78543.png

  • Physics-Mechanical Properties of Fluids-78544.png
A big drop of radius R is formed by 1000 small droplets of coater then the radius of small drop is

  • Physics-Mechanical Properties of Fluids-78546.png
  • 2)
    Physics-Mechanical Properties of Fluids-78547.png

  • Physics-Mechanical Properties of Fluids-78548.png

  • Physics-Mechanical Properties of Fluids-78549.png
If a coater drop is kept between two glasses plates then its shape is

  • Physics-Mechanical Properties of Fluids-78551.png
  • 2)
    Physics-Mechanical Properties of Fluids-78552.png

  • Physics-Mechanical Properties of Fluids-78553.png
  • None of these
A liquid wets a solid completely. The menisions of the liquid in a surfficently long tube is
  • Flat
  • Concave
  • Convex
  • Cylindrical
When two soap bubbles of radius r1 and r2 (r2 > r1) coalesce, the radius of curvature of common surface is...........
  • r2 – r1
  • 2)
    Physics-Mechanical Properties of Fluids-78554.png

  • Physics-Mechanical Properties of Fluids-78555.png

  • Physics-Mechanical Properties of Fluids-78556.png
The excess of pressure inside a soap bubble than that of the other pressure is

  • Physics-Mechanical Properties of Fluids-78557.png
  • 2)
    Physics-Mechanical Properties of Fluids-78558.png

  • Physics-Mechanical Properties of Fluids-78559.png

  • Physics-Mechanical Properties of Fluids-78560.png
In capilley pressure below the curved surface at water will be
  • Equal to atomospheric
  • Equal to upper side pressure
  • More than upper side pressure
  • Lesser than upper side pressure
A vesel whose bottom has round holes with diametre of 0.1 mm is filled with water. The maximum height to which the water can be filled without leakage is
Physics-Mechanical Properties of Fluids-78561.png
  • 100 cm
  • 75 cm
  • 50 cm
  • 30 cm
The value of Poisson's ratio lies between........

  • Physics-Mechanical Properties of Fluids-78836.png
  • 2)
    Physics-Mechanical Properties of Fluids-78837.png

  • Physics-Mechanical Properties of Fluids-78838.png

  • Physics-Mechanical Properties of Fluids-78839.png
Water rises in a vertical capillary tube upto a height of 2.0 cm. If tube is inclined at an angle of 60o with the vertical then the what length the water will rise in the tube.
  • 2.0 cm
  • 4.0 cm

  • Physics-Mechanical Properties of Fluids-78562.png

  • Physics-Mechanical Properties of Fluids-78563.png
Assertion : It is better to wash the clothes in cold soap solution.
Reason : The surface tension of cold solution is more then the surface tension of hot solution.
  • If both assertion and reason are true and the reason is the correct explanation of the assertion
  • If both assertion and reason are true but reason is not the correct explanation of the assertion
  • If assertion is true but reason is false
  • If the assertion and reason both are false
  • None of these
A piece of solid weighs 120 g in air, 80 g in water and 60 g in liquid the relative density of the solid and that of the solid and that of the liquid are respectively.
  • 3, 2
  • 2)
    Physics-Mechanical Properties of Fluids-78565.png

  • Physics-Mechanical Properties of Fluids-78566.png

  • Physics-Mechanical Properties of Fluids-78567.png
Ice pieces are floating in a beaker A containing watre and also in a beakre B containing miscible liquid of specific gravity 1.2 Ice melts the level of
  • water increases in A
  • water decreases in A
  • Liquid in B decrease B
  • Liquid in B increase
The height of the dam in an hydro electric power station is 10 m. In order to generate 1 MW of electric power, the mass of water (in kg) that must full per second on the brades of turbine is
  • 106
  • 105
  • 103
  • 104
An incompressible fluid flows steadily through a cylindrical pipe which has radius 2 r at point A and radius r at B further along the flow direction. It the velocity at point A is V, its velocity at point B.
  • 2v
  • v

  • Physics-Mechanical Properties of Fluids-78568.png
  • 4v
A block of ice floats on a liquid of density 1.2 in a beaker then level of liquid when ice completely melt.
  • Remains same
  • Rises
  • Lowers
  • ((or (3)
Assertion : To empty an oil tank two holes so it will made.
Reason : Oil will come out of two holes so it will be emptied faster.
(a)If both assertion and reason are true and the reason is the correct explanation of the assertion.
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.
(c) If assertion is true but reason is false.
(d) IF the assertion and reason are false.
(e) If assertion is false but reason is true.
  • a
  • b
  • c
  • d
Oxygen boils at 183oC. This temperature is approximately.
  • 215o F
  • -297o F
  • 329o F
  • 361o F
Maximum density of H2O is at the temperature.
  • 32o F
  • 39.2o F
  • 42o F
  • 4o F
Mercury thermometers can be used to measure tempratures up to
  • 100o C
  • 212o C
  • 360o C
  • 500o C
If temperature of an object is 140o F then its temperature in centigratde is
  • 105o C
  • 32o C
  • 140o C
  • 60o C
When the room temprature becomes equal to the dew point the relative humidity of the room is
  • 100 %
  • 0 %
  • 70 %
  • 85 %
If the length of a cylinder on heating increases by 2% the area of its base will increase by.
  • 0.5 %
  • 2 %
  • 1 %
  • 4 %
Density of substance at 0o C is 10 gm/cc and at 100o C its density is 9.7 gm/CC. The coefficient of linear expansion of the substance will be
  • 102
  • 10‒2
  • 10‒3
  • 10‒4
A beaker is completely filled with water at 4o C It will overflow if
  • Heated above 4o C
  • Cooled below 4o C
  • Both heated and cooled above and below 4o C respectively
  • None of these

Physics-Mechanical Properties of Fluids-78574.png
  • 0.5 cm
  • 1.0 cm
  • 1.5 cm
  • 2.0 cm
0:0:1


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