Young's Modulus(Bulk Modulus, Modulus of Rigidity) NEET Questions

Physics - Properties of Solids and Liquids

Young's Modulus(Bulk Modulus, Modulus of Rigidity) MCQ Questions


7.
Young's modulus is applicable to which state(s) of matter?
A.
Gases only
B.
Liquids and gases only
C.
Solids, liquids, and gases
D.
Solids only
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ANSWER :
D. Solids only
8.
A material with a large Young's modulus is described as:
A.
Very brittle
B.
Very elastic (easily deformed)
C.
Very ductile
D.
Very stiff (requires large force for small deformation)
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ANSWER :
D. Very stiff (requires large force for small deformation)
9.
In daily life, people think rubber is 'more elastic' than steel. In physics, which is actually more elastic?
A.
Rubber, because it stretches more
B.
Both have equal elasticity
C.
Steel, because it has a much higher Young's modulus
D.
Copper, because it is ductile
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ANSWER :
C. Steel, because it has a much higher Young's modulus
10.
Which of the following correctly lists materials in decreasing order of Young's modulus (from NCERT Table 8.1)?
A.
Steel > Copper > Aluminium > Bone
B.
Aluminium > Copper > Steel > Bone
C.
Copper > Steel > Bone > Aluminium
D.
Bone > Steel > Copper > Aluminium
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ANSWER :
A. Steel > Copper > Aluminium > Bone
11.
A structural steel rod (Y = 2 × 10¹¹ N m⁻²) of radius 10 mm and length 1 m is stretched by a force of 100 kN. The stress in the rod is: (π ≈ 3.14)
A.
3.18 × 10⁸ N m⁻²
B.
1.59 × 10⁸ N m⁻²
C.
0.80 × 10⁸ N m⁻²
D.
6.36 × 10⁸ N m⁻²
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ANSWER :
A. 3.18 × 10⁸ N m⁻²
12.
For the steel rod in NCERT Example 8.1 (Y = 2 × 10¹¹ N m⁻², L = 1 m, stress = 3.18 × 10⁸ N m⁻²), the elongation ΔL is:
A.
0.0159 mm
B.
0.159 mm
C.
1.59 mm
D.
15.9 mm
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ANSWER :
C. 1.59 mm