Young's Modulus of Elasticity of the Material of a Metallic Wire NEET Questions

Physics - Experimental Skills

Young's Modulus of Elasticity of the Material of a Metallic Wire MCQ Questions


13.
Young’s modulus of steel is:
A.
2 × 10⁹ N/m²
B.
2 × 10¹¹ N/m²
C.
2 × 10⁴ N/m²
D.
2 × 10⁵ N/m²
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ANSWER :
B. 2 × 10¹¹ N/m²
14.
What is the effect on Young’s modulus if the wire is heated?
A.
Decreases
B.
Increases
C.
Remains the same
D.
First increases, then decreases
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ANSWER :
A. Decreases
15.
The strain energy stored per unit volume in a stretched wire is given by:
A.
σ/ε
B.
1/2 × stress × strain
C.
σY
D.
σ²/2Y
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ANSWER :
D. σ²/2Y
16.
Which of the following statements is true for Young’s modulus?
A.
It is independent of material
B.
It is the same for all materials
C.
Modulus of rigidity
D.
It depends on the force applied
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ANSWER :
D. It depends on the force applied
17.
The ratio of lateral strain to longitudinal strain is called:
A.
Poisson’s ratio
B.
Bulk modulus
C.
1/2 × Y × strain²
D.
Young’s modulus
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ANSWER :
A. Poisson’s ratio
18.
If a wire is stretched within its elastic limit, the work done per unit volume is given by:
A.
σ²/Y
B.
σ/Y
C.
Remain the same
D.
Y/σ
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ANSWER :
B. σ/Y