Hooke's Law (Elastic Behaviour and Stress-Strain Relationship) NEET Questions

Physics - Properties of Solids and Liquids

Hooke's Law (Elastic Behaviour and Stress-Strain Relationship) MCQ Questions


1.
Hooke’s law states that within the elastic limit, stress is:
A.
Exponential with strain
B.
Inversely proportional to strain
C.
Independent of strain
D.
Directly proportional to strain
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ANSWER :
D. Directly proportional to strain
2.
The modulus of elasticity is defined as:
A.
The difference of stress and strain
B.
The product of stress and strain
C.
The sum of stress and strain
D.
The ratio of stress to strain
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ANSWER :
D. The ratio of stress to strain
3.
The unit of Young’s modulus is:
A.
N·m
B.
N/m²
C.
N·s
D.
m/s²
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ANSWER :
B. N/m²
4.
Which of the following materials typically follows Hooke’s law?
A.
Rubber
B.
Steel
C.
Glass
D.
Clay
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ANSWER :
B. Steel
5.
Two wires are made of the same material and have the same volume. The first wire has cross-sectional area A and the second wire has cross-sectional area 3A. If the length of the first wire is increased by Δl on applying a force F, how much force is needed to stretch the second wire by the same amount?

NEET - 2018

A.
9F
B.
6F
C.
4F
D.
F
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ANSWER :
A. 9F
6.
The slope of the linear portion of a stress-strain curve gives:
A.
Young’s modulus
B.
Poisson’s ratio
C.
Shear modulus
D.
Bulk modulus
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ANSWER :
A. Young’s modulus