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


13.
Shearing strain is defined as:
A.
Change in length to original length (ΔL/L)
B.
Change in volume to original volume (ΔV/V)
C.
Relative displacement of opposite faces (Δx) to the perpendicular length (L) — equal to tan θ ≈ θ
D.
Applied force to cross-sectional area (F/A)
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ANSWER :
C. Relative displacement of opposite faces (Δx) to the perpendicular length (L) — equal to tan θ ≈ θ
14.
Volume strain (produced by hydraulic pressure) is defined as:
A.
Δx/L
B.
F/A
C.
ΔV/V
D.
ΔL/L
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ANSWER :
C. ΔV/V
15.
Strain is a dimensionless quantity because:
A.
It involves no force
B.
It is a ratio of change in a dimension to its original dimension (same units cancel)
C.
It equals stress divided by modulus
D.
It is measured in Pascals
😑 View Answer Rough Work Error
ANSWER :
B. It is a ratio of change in a dimension to its original dimension (same units cancel)
16.
Young's modulus (Y) is defined as:
A.
Shearing stress / shearing strain
B.
Applied force / area
C.
Tensile (or compressive) stress / longitudinal strain
D.
Hydraulic stress / volume strain
😑 View Answer Rough Work Error
ANSWER :
C. Tensile (or compressive) stress / longitudinal strain
17.
For a wire of length L and cross-sectional area A with Young's modulus Y, the elongation ΔL produced by force F is:
A.
ΔL = FL/(YA)
B.
ΔL = FA/(YL)
C.
ΔL = FY/(AL)
D.
ΔL = YAL/F
😑 View Answer Rough Work Error
ANSWER :
A. ΔL = FL/(YA)
18.
Among the following, which material has the highest Young's modulus (NCERT Table 8.1)?
A.
Steel (200 GPa)
B.
Copper (110 GPa)
C.
Aluminium (70 GPa)
D.
Bone (9.4 GPa)
😑 View Answer Rough Work Error
ANSWER :
A. Steel (200 GPa)