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


7.
A wire is stretched by a force, and the length increases by 0.2%. If Young’s modulus of the material is 2 × 10¹¹ N/m², what is the stress in the wire?
A.
4 × 10⁹ N/m²
B.
4 × 10⁸ N/m²
C.
4 × 10¹⁰ N/m²
D.
4 × 10¹² N/m²
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ANSWER :
B. 4 × 10⁸ N/m²
8.
The value of Young’s modulus is highest for:
A.
Copper
B.
Steel
C.
Wood
D.
Plastic
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ANSWER :
B. Steel
9.
A material is said to be elastic if:
A.
It does not regain its original shape
B.
It returns to its original shape
C.
It resists deformation
D.
It breaks under load
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ANSWER :
B. It returns to its original shape
10.
The dimensional formula of Young’s modulus is:
A.
[M L⁻¹ T⁻²]
B.
[M L⁻¹ T⁻²]
C.
[M L⁰ T⁻²]
D.
[M L T⁻²]
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ANSWER :
A. [M L⁻¹ T⁻²]
11.
What happens to the Young’s modulus of a material if its temperature is increased?
A.
Remains constant
B.
Decreases
C.
Increases
D.
Becomes zero
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ANSWER :
B. Decreases
12.
Which of the following graphs correctly represents Hooke’s Law?
A.
Linear
B.
Parabolic
C.
Exponential
D.
None of these
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ANSWER :
A. Linear