Mechanical Properties of Fluids Test

Result

Mechanical Properties of Fluids Test - 82

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Question 1
4 / -1

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.

A
OD

B
OC

C
OB

D
OA

Solution
Question 2
4 / -1

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.

A
ab

B
bc

C
cd

D
oa

Solution
Question 3
4 / -1

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.

A
If both assertion and reason are true and 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 assertion and reason both are false
Question 4
4 / -1

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.

A
If both assertion and reason are true and 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 assertion and reason both are false

Solution
Question 5
4 / -1

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

A
2πrT + w

B
2πrTcosθ – w

C
2πrTcosθ + w

D
w = 2πrTcosθ

Solution
Question 6
4 / -1

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)

A

B

C

D

Solution
Question 7
4 / -1

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.

A
3πTr²

B
6πTr²

C
12πTr²

D
24πTr²

Solution
Question 8
4 / -1

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

A
100%

B
75%

C
50%

D
25%

Solution
Question 9
4 / -1

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

A
1 : 10

B
1 : 15

C
1 : 20

D
1 : 25

Solution
Question 10
4 / -1

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)

A

B

C

D

Solution