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.
The SI unit of Young's modulus is:
A.
Joule/m²
B.
N·m
C.
N/m² or pascal (Pa)
D.
N/m
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ANSWER :
C. N/m² or pascal (Pa)
14.
Young's modulus is a property that depends on:
A.
Diameter of the wire
B.
Force applied to the wire
C.
Length of the wire
D.
Nature of the material and its temperature
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ANSWER :
D. Nature of the material and its temperature
15.
The dimensional formula of Young's modulus is:
A.
[ML⁻¹T⁻²]
B.
[MLT⁻²]
C.
[ML⁻²T⁻²]
D.
[ML²T⁻²]
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ANSWER :
A. [ML⁻¹T⁻²]
16.
Young's modulus of steel is approximately:
A.
2 × 10¹⁵ N/m²
B.
2 × 10¹¹ N/m² (or 200 GPa)
C.
2 × 10⁵ N/m²
D.
2 × 10⁹ N/m²
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ANSWER :
B. 2 × 10¹¹ N/m² (or 200 GPa)
17.
Young's modulus of rubber is approximately:
A.
10¹¹ N/m²
B.
10⁻³ N/m²
C.
10⁹ N/m²
D.
10⁶ N/m²
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ANSWER :
D. 10⁶ N/m²
18.
If a wire is stretched to twice its original length within the elastic limit, the strain is:
A.
0.5
B.
0
C.
1 (or 100%)
D.
2
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ANSWER :
C. 1 (or 100%)