Mechanical Properties of Fluids Test

Result

Mechanical Properties of Fluids Test - 43

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Question 1
4 / -1

The strain–stress curves of three wires of different materials are shown in the figure. P, Q and R the elastic limits of the wires the figure shows that

A
Elasticity of wire P is maximum

B
Elasticity of wire Q is maximum

C
Tensile strength of R is maximum

D
none of above
Question 2
4 / -1

The diagram shows a force extension graph for a Rubber band consider the following statements.
(I). It will be easier to compress these rubber than expand it
(II). Rubber does not return to its original length after it is stretched
(III). The rubber band will get heated if it is stretched and released
Which of these can be deduced from the graph.

A
III only

B
II and III

C
I and III

D
I only

Solution
Question 3
4 / -1

The stress versus strain graph for wires of two material A & B are as shown in the figure. If Y_A and Y_B are the young\'s modulus of the materials then

A
Y_B = 2Y_A

B
Y_A = Y_B

C
Y_B = 3Y_A

D
Y_A = 3Y_B
Question 4
4 / -1

The adjacent graph shows the extension of a wire of length 1m suspended from the top of a roof at one end with the load W connected to the other end. If the cross sectional area of the wire is 10^–6 m² , calculate the young's modulus of the material of the wire.

A

B

C

D
Question 5
4 / -1

The graph shows the behavior of a length of wire in the region for which the substance obey's Hooke's law. P & Q represent.

A
p = applied force, Q = extension

B
p = extension, Q = applied force

C
p = extension, Q = stored elastic energy

D
p = stored elastic energy, Q = extension

Solution
Question 6
4 / -1

The potential energy U between two molecules as a function of the distance x between them has been shown in the figure. The two molecules are.

A
Attracted when x lies between A & B and are repelled when x lies between B & C

B
Attracted when x lies between B and C and are repelled when x lies between A and B

C
Attracted when they reach B

D
Repelled when they reach B

Solution
Question 7
4 / -1

The diagram shows stress v/s strain curve for the materials A and B. From the curves we infer that

A
A is brittle but B is ductile

B
A is ductile and B is brittle

C
Both A & B are ductile

D
Both A & B are brittle

Solution
Question 8
4 / -1

Which are of the following is the young's modulus (in N/m²) for the wire having the stress strain curve in the figure.

A

B

C

D
Question 9
4 / -1

The diagram shows the change x in the length of a thin uniform wire caused by the application of stress F at two different temperature T₁ & T₂. The variation

A
T₁ > T₂

B
T₁ < T₂

C
T₁ = T₂

D
None of these

Solution
Question 10
4 / -1

The point of maximum and minimum attraction in the curve between potential energy (U) and distance (r) of a diatomic molecules are respectively.

A
S and R

B
T and S

C
R and S

D
S and T