Mechanical Properties of Solids Test

Result

Mechanical Properties of Solids Test - 24

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Weekly Quiz Competition

Question 1
4 / -1

If a spring is extended to length l, then according to Hooke\'s law

A

B

C

D
Question 2
4 / -1

Which of the following affects the elasticity of a substance?

A
Hammering and annealing

B
Change in temperature

C
Impurity in substance

D
All of the above
Question 3
4 / -1

An iron rod of length 2 m and cross-section area of 50 mm², stretched by 0.5 mm, when a mass of 250 kg is hung from its lower end. Young\'s modulus of the iron rod is

A
19.6 × 10¹⁰ N/m²

B
19.6 × 10¹⁵ N/m²

C
19.6 × 10¹⁸ N/m²

D
19.6 × 10²⁰ N/m²

Solution
Question 4
4 / -1

In solids, inter-atomic forces are

A
Totally repulsive

B
Totally attractive

C
Combination of (a) and (b)

D
None of the above
Question 5
4 / -1

A load W produces an extension of 1 mm in a thread of radius r. Now, if the load is made 4W and radius is made 2r all other things remaining same, the extension will become

A
4 mm

B
16 mm

C
1 mm

D
0.25 mm

Solution
Question 6
4 / -1

The modulus of elasticity is dimensionally equivalent to

A
Surface tension

B
Stress

C
Strain

D
None of these
Question 7
4 / -1

Under elastic limit the stress is

A
Inversely proportional to strain

B
Directly proportional to strain

C
Square root of strain

D
Independent of strain
Question 8
4 / -1

Young\'s modulus of the wire depends on

A
Length of the wire

B
Diameter of the wire

C
Material of the wire

D
Mass hanging from the wire
Question 9
4 / -1

A wire of length L is hanging from a fixed support. The length changes to L₁ and L₂ when masses M₁ and M₂ are suspended respectively from its free end. Then L is equal to

A

B

C

D

Solution
Question 10
4 / -1

Which of the following substances has the highest elasticity

A
Sponge

B
Steel

C
Rubber

D
Copper