Mechanical Properties of Solids Test

Result

Mechanical Properties of Solids Test - 25

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Weekly Quiz Competition

Question 1
4 / -1

Which one of the following statements is correct? In the case of

A
Shearing stress there is change in volume

B
Tensile stress there is no change in volume

C
Shearing stress there is no change in shape

D
Tensile stress there is no change in shape
Question 2
4 / -1

Identify the incorrect statement

A
Young's modulus and shear modulus are relevant only for solids

B
Bulk modulus is relevant for solids, liquids and gases

C
Alloys have larger values of Young's modulus than metals

D
Metals have large values of Young's modulus than elastomers
Question 3
4 / -1

A metalic rod of length 1 and cross-sectional area A is made of a material of Young modulus Y. If the rod is elongated by an amount y, then the work done is proportional to

A

B

C

D

Solution
Question 4
4 / -1

The work done in stretching an elastic wire per unit volume is or strain energy in a stretched string is

A
Stress × Strain

B
1/2 × Stress × Strain

C
2 × Strain × Stress

D
Stress/Strain
Question 5
4 / -1

Two wires of same diameter of the same material having the length 1 and 21. If the force F is applied on each, the ratio of the work done in the two wires will be

A
1 : 2

B
1 : 4

C
2 : 1

D
1 : 1

Solution
Question 6
4 / -1

A 5 m long wire is fixed to the ceiling. A weight of 10 kg is hung at the lower end and is 1 m above the floor. The wire was elongated by 1 mm. The energy stored in the wire due to stretching is

A
Zero

B
0.05 J

C
100 J

D
500 J

Solution
Question 7
4 / -1

If the forces constant of a wire is K, the work done in increasing the length of the wire by 1 is

A
Kl/2

B
Kl

C
Kl²/2

D
Kl²

Solution
Question 8
4 / -1

An elastic material of Young\'s modulus Y is subjected to a stress S. The elastic energy stored per unit volume of the material is

A

B

C

D
Question 9
4 / -1

A wire suspended vertically from one of its ends is stretched by attaching a weight of 200 N to the lower end. The weight stretches the wire by 1 mm. Then the elastic energy stored in the wire is

A
0.1 J

B
0.2 J

C
10 J

D
20 J

Solution
Question 10
4 / -1

A brass rod of cross-sectional area 1 cm² and length 0.2 m is compressed lengthwise by a weight of 5 kg. If Young\'s modulus of elasticity of brass is 1 × 10¹¹ N/m² and g = 10 m/sec², then increase in the energy of the rod will be

A
10^–5 J

B
2.5 × 10^–5 J

C
5 × ^–5 J

D
2.5 × 10^–4 J

Solution