JEE Questions for Physics Mechanical Properties Of Fluids Quiz 16 - MCQExams.com

A uniform cube is subjected to volume compression. If each side is decreased by 1% Then what is bulk strain ?
  • 0.01
  • 0.06
  • 0.02
  • 0.03
A raindrop with radius 1.5 mm falls from a cloud at a height 1200 m from ground. The density of water is 1000 kg/m3 and density of air is 1.2 kg/m3. Assume the drop was spherical throughout the fall and there is no air drag. The impact speed of the drop will be
  • 27 km/h
  • 550 km/h
  • Zero
  • 129 km/h
Blood is flowing at the rate of 200 cm3s–1 in a capillary of cross sectional area 0.5 m2. The velocity of flow, in mms–1, is
  • 0.1
  • 0.2
  • 0.3
  • 0.4
A cylindrical vessel of 90 cm height is kept filled upto the brim. It has four holes 1, 2, 3, 4 which are respectively at heights of 20 cm, 30 cm, 45 cm and 50 cm from the horizontal floor PQ. The water falling at the maximum horizontal distance from the vessel comes from
Physics-Mechanical Properties of Fluids-79417.png
  • Hole number 4
  • Hole number 3
  • Hole number 2
  • Hole number 1
In Poiseuilli\'s method of determination of coefficient of viscosity, the physical quantity that requires greater accuracy in measurement is
  • Pressure difference
  • Volume of the liquid collected
  • Length of the capillary tube
  • Inner radius of the capillary tube
Aerofils are so designed that the speed of air
  • On top side is more than on lower side
  • On top side is less than on lower side
  • Is same on both sides
  • Is turbulent
An incompressible fluid flows steadily through a cylindrical pipe which has radius 2r at point A and radius r at B further along the flow direction. If the velocity at point A is v, its velocity at point B is
  • 2v
  • v
  • v/2
  • 4v
If the terminal speed of a sphere of gold (density = 19.5 kg/m3) is 0.2 m/s in a viscous liquid (density = 1.5 kg/m3), find the terminal speed of a sphere of silver (density = 10.5 kg/m3) of the same size in the same liquid
  • 0.133 m/s
  • 0.1 m/s
  • 0.2 m/s
  • 0.4 m/s
Two wires are made of the same material and have the same volume. However, wire 1 has cross- sectional area A and wire 2 has cross-sectional Area 3A. If the length of wire 1 increases by on applying force F. How much force is needed to stretch wire 2 by same amount.
  • F
  • 4F
  • 6F
  • 9F
The dimensions of four wires of the same material are given below, in which wire the increase in length will be maximum when the same strain is applied.
  • Length 100 cm, Diameter 1 mm
  • Length 200 cm, Diameter 2 mm
  • Length 300 cm, Diameter 3 mm
  • Length 50 cm, Diameter 0.5 mm
A wire is loaded by 6 kg at its one end, the increase in length is 12 mm. If the radius of the wire is doubled and all other magnitudes are unchanged, then increase in length will be.............
  • 6 mm
  • 3 mm
  • 24 mm
  • 48 mm

Physics-Mechanical Properties of Fluids-79423.png
  • E
  • 2E

  • Physics-Mechanical Properties of Fluids-79424.png

  • Physics-Mechanical Properties of Fluids-79425.png

Physics-Mechanical Properties of Fluids-79427.png
  • 40 kg
  • 60 kg
  • 80 kg
  • 100 kg

Physics-Mechanical Properties of Fluids-79429.png

  • Physics-Mechanical Properties of Fluids-79430.png
  • 2)
    Physics-Mechanical Properties of Fluids-79431.png

  • Physics-Mechanical Properties of Fluids-79432.png

  • Physics-Mechanical Properties of Fluids-79433.png
There are two wires of same material and same length. While the diameter of second wire is 2 times, the diameter of first wire. Then what will be the ratio of extension produced in the wire by applying same load ?
  • 1 : 1
  • 2 : 1
  • 1 : 2
  • 4 : 1
When the length of a wire having cross-section area 10–6 m2 is stretched by 0.1% then tension in it is 100 N. Young's modulus of material of wire is...........

  • Physics-Mechanical Properties of Fluids-79436.png
  • 2)
    Physics-Mechanical Properties of Fluids-79437.png

  • Physics-Mechanical Properties of Fluids-79438.png

  • Physics-Mechanical Properties of Fluids-79439.png
Two wires of equal lengths are made of the same material wire A has a diameter that is twice as that of wire B. If identical weights are suspended from the ends of these wires the increase in length is............
  • Four times for wire A as for wire B
  • Twice for wire A as for wire B
  • Half for wire A as for wire B
  • One–fourth for wire A as for wire B

Physics-Mechanical Properties of Fluids-79442.png

  • Physics-Mechanical Properties of Fluids-79443.png
  • 2)
    Physics-Mechanical Properties of Fluids-79444.png

  • Physics-Mechanical Properties of Fluids-79445.png

  • Physics-Mechanical Properties of Fluids-79446.png
A wire elongates by 1 mm when a load W is hanged from it. If the wire goes ever a pulley and two weight W each are hang at the two ends. What will be the elongation of the wire ? (in mm)
  • 2l
  • zero
  • l/2
  • l

Physics-Mechanical Properties of Fluids-79449.png

  • Physics-Mechanical Properties of Fluids-79450.png
  • 2)
    Physics-Mechanical Properties of Fluids-79451.png

  • Physics-Mechanical Properties of Fluids-79452.png

  • Physics-Mechanical Properties of Fluids-79453.png

Physics-Mechanical Properties of Fluids-79455.png

  • Physics-Mechanical Properties of Fluids-79456.png
  • 2)
    Physics-Mechanical Properties of Fluids-79457.png

  • Physics-Mechanical Properties of Fluids-79458.png

  • Physics-Mechanical Properties of Fluids-79459.png

Physics-Mechanical Properties of Fluids-79461.png

  • Physics-Mechanical Properties of Fluids-79462.png
  • 2)
    Physics-Mechanical Properties of Fluids-79463.png

  • Physics-Mechanical Properties of Fluids-79464.png

  • Physics-Mechanical Properties of Fluids-79465.png
A wire of cross-section 4 mm2 is stretched by 0.1 mm by a certain weight. How far (length) will be wire of same material and length but of area 8 mm2 stretched under the action of same force.
  • 0.05 mm
  • 0.10 mm
  • 0.15 mm
  • 0.20 mm

Physics-Mechanical Properties of Fluids-79468.png
  • 3L
  • 4L
  • 2L
  • None of the above
A copper wire and a steel wire of same diameter and length are connected end to end a force is applied, which stretches their combined length by 1 cm, the two wires will have.......
  • different stresses and strains
  • the same stress and strain
  • the same strain but different stresses
  • the same stress but different strains

Physics-Mechanical Properties of Fluids-79471.png

  • Physics-Mechanical Properties of Fluids-79472.png
  • 2)
    Physics-Mechanical Properties of Fluids-79473.png

  • Physics-Mechanical Properties of Fluids-79474.png

  • Physics-Mechanical Properties of Fluids-79475.png
Two similar wires under the same load yield elongation of 0.1 mm and 0.05 mm respectively. If the area of Cross – section of the first wire is 4 mm2. Then what is the area of cross – section of the second wire?
  • 6 mm2
  • 8 mm2
  • 10 mm2
  • 12 mm2
Two wires of same diameter of the same material having the length l and 2l. If the force F is applied on each, what will be the ratio of the work done in the two wires ?
  • 1 : 2
  • 1 : 4
  • 2 : 1
  • 1 : 1
Young's modulus of the material of a wire is Y. On pulling the wire by a force F the increase in its length is x, what is the potential energy of the stretched wire ?

  • Physics-Mechanical Properties of Fluids-79479.png
  • 2)
    Physics-Mechanical Properties of Fluids-79480.png

  • Physics-Mechanical Properties of Fluids-79481.png
  • None of these
k is the force constant of a spring what will be the work done in increasing its extension form l1 to l1 be

  • Physics-Mechanical Properties of Fluids-79483.png
  • 2)
    Physics-Mechanical Properties of Fluids-79484.png

  • Physics-Mechanical Properties of Fluids-79485.png

  • Physics-Mechanical Properties of Fluids-79486.png
If the volume of a block of aluminium is decreased, by the pressure (stress) on its surface is increased by.................(Bulk modulus of Al = 7.5 × 1010 Nm–2)

  • Physics-Mechanical Properties of Fluids-79488.png
  • 2)
    Physics-Mechanical Properties of Fluids-79489.png

  • Physics-Mechanical Properties of Fluids-79490.png

  • Physics-Mechanical Properties of Fluids-79491.png
The specific heat at constant pressure and at constant volume for an ideal gas are Cp and Cv and isothermal elasticities are Eϕ and Eθ respectively. What is the ratio of Eϕ and Eθ.

  • Physics-Mechanical Properties of Fluids-79493.png
  • 2)
    Physics-Mechanical Properties of Fluids-79494.png

  • Physics-Mechanical Properties of Fluids-79495.png

  • Physics-Mechanical Properties of Fluids-79496.png
The pressure applied from all directions on a cube is p. How much its temperature should be raised to maintain the original volume ? The volume elasticity. of the cube is B and the coefficient of volume expansion is α.

  • Physics-Mechanical Properties of Fluids-79498.png
  • 2)
    Physics-Mechanical Properties of Fluids-79499.png

  • Physics-Mechanical Properties of Fluids-79500.png

  • Physics-Mechanical Properties of Fluids-79501.png

Physics-Mechanical Properties of Fluids-79504.png
  • P
  • 2)
    Physics-Mechanical Properties of Fluids-79505.png

  • Physics-Mechanical Properties of Fluids-79506.png

  • Physics-Mechanical Properties of Fluids-79507.png
There is no change in the volume of a wire due to change in its length on stretching. What is the passion's ratio of the material of the wire....
  • +0.5
  • –0.50
  • 0.25
  • –0.25
Two wires A & B of same length and of the same material have the respective radius r1 and r2 their one end is fixed with a rigid support and at the other end equal twisting couple is applied. Then what will we be the ratio of the angle of twist at the end of A and the angle of twist at the end of B.

  • Physics-Mechanical Properties of Fluids-79510.png
  • 2)
    Physics-Mechanical Properties of Fluids-79511.png

  • Physics-Mechanical Properties of Fluids-79512.png

  • Physics-Mechanical Properties of Fluids-79513.png
If the young's modulus of the material is 3 times its modulus of rigidity. Then what will be its volume elasticity?
  • zero
  • infinity

  • Physics-Mechanical Properties of Fluids-79515.png

  • Physics-Mechanical Properties of Fluids-79516.png
The load versus elongation graph for four wires of the same material is shown in the figure. The thickest wire is represented by the line.
Physics-Mechanical Properties of Fluids-79518.png
  • OD
  • OC
  • OB
  • OA
The graph is drawn between the applied force F and the strain (x) for a thin uniform wire the wire behaves as a liquid in the part.
Physics-Mechanical Properties of Fluids-79520.png
  • ab
  • bc
  • cd
  • oa
Assertion : The stretching of a coil is determined by its shear modulus.
Reason : Shear modulus change only shape of a body keeping its dimensions unchanged.
  • If both assertion and reason are true and 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 assertion and reason both are false
Assertion : Two identical solid balls, one of ivory and the other of wet clay are dropped from the same height on the floor. Both the balls will rise to same height after.
Reason : Ivory and wet–clay have same elasticity.
  • If both assertion and reason are true and 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 assertion and reason both are false
A thm metal disc of radius r floats on water surface B and bends the surface down wards along the perimeter making an angle Q with vertical edge of the disc. If the disc displaces a weight of water W and surface tension of water is T, then the weight at metal dis
  • 2πrT + w
  • 2πrTcosθ – w
  • 2πrTcosθ + w
  • w = 2πrTcosθ
The amount of work done in blowing a soap bubble such that its diameter increases from d to D is (T = Surface tension of solution)

  • Physics-Mechanical Properties of Fluids-79524.png
  • 2)
    Physics-Mechanical Properties of Fluids-79525.png

  • Physics-Mechanical Properties of Fluids-79526.png

  • Physics-Mechanical Properties of Fluids-79527.png
A soap bubble of radius r is blown up to form a bubble of radius 2r under isothermal conditions if the T is the surface tension of soap solution the energy spent in the slowing is.
  • 3πTr2
  • 6πTr2
  • 12πTr2
  • 24πTr2
A frame made of a metalic wire enclosing O surface area A is covered with a soap film. If the area of the frame metalic wire is reduced by 50% the energy of the soap film will be changed by
  • 100%
  • 75%
  • 50%
  • 25%
8000 identioal water drops are combined to form a bigdrop. Then the ration of the final surface energy to the intilial surface energy of all the drops together is
  • 1 : 10
  • 1 : 15
  • 1 : 20
  • 1 : 25
If the excess pressure inside a soap bubble is balanced by oil column of height 2 mm then the surface tension of soap solution will be. (r = 1 and density d = 0.8 gm/cc)

  • Physics-Mechanical Properties of Fluids-79532.png
  • 2)
    Physics-Mechanical Properties of Fluids-79533.png

  • Physics-Mechanical Properties of Fluids-79534.png

  • Physics-Mechanical Properties of Fluids-79535.png
The correct relation is

  • Physics-Mechanical Properties of Fluids-79537.png
  • 2)
    Physics-Mechanical Properties of Fluids-79538.png

  • Physics-Mechanical Properties of Fluids-79539.png

  • Physics-Mechanical Properties of Fluids-79540.png
The lower end of a glass capillary tube is dipped in water rises to a height of 8 cm the tube is then broken at a height of 6 cm. The height of water column and engled as contact will be

  • Physics-Mechanical Properties of Fluids-79541.png
  • 2)
    Physics-Mechanical Properties of Fluids-79542.png

  • Physics-Mechanical Properties of Fluids-79543.png

  • Physics-Mechanical Properties of Fluids-79544.png
The correct curve between the height or depression h of liquid in a capillary tube and its radius is

  • Physics-Mechanical Properties of Fluids-79546.png
  • 2)
    Physics-Mechanical Properties of Fluids-79547.png

  • Physics-Mechanical Properties of Fluids-79548.png

  • Physics-Mechanical Properties of Fluids-79549.png
0:0:1


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