Young's Modulus(Bulk Modulus, Modulus of Rigidity) NEET Questions

Physics - Properties of Solids and Liquids

Young's Modulus(Bulk Modulus, Modulus of Rigidity) MCQ Questions


1.
Young's modulus (Y) is defined as the ratio of:
A.
Hydraulic stress to volumetric strain
B.
Lateral strain to longitudinal strain
C.
Shearing stress to shearing strain
D.
Tensile (or compressive) stress to longitudinal strain
😑 View Answer Rough Work Error
ANSWER :
D. Tensile (or compressive) stress to longitudinal strain
2.
The mathematical expression for Young's modulus in terms of applied force F, original length L, cross-sectional area A, and elongation ΔL is:
A.
Y = FΔL / (AL)
B.
Y = AL / (FΔL)
C.
Y = FL / (AΔL)
D.
Y = AΔL / (FL)
😑 View Answer Rough Work Error
ANSWER :
C. Y = FL / (AΔL)
3.
The SI unit of Young's modulus is:
A.
N m (Newton-metre)
B.
kg m⁻¹
C.
N m⁻² (Pascal)
D.
Dimensionless
😑 View Answer Rough Work Error
ANSWER :
C. N m⁻² (Pascal)
4.
The dimensional formula of Young's modulus is:
A.
[ML²T⁻²]
B.
[MLT⁻²]
C.
[M⁰L⁰T⁰]
D.
[ML⁻¹T⁻²]
😑 View Answer Rough Work Error
ANSWER :
D. [ML⁻¹T⁻²]
5.
For a given material, Young's modulus has the same value whether the applied stress is tensile or compressive. This means:
A.
Compressive stress is always larger than tensile stress
B.
Young's modulus is zero for compression
C.
The material behaves differently under tension and compression
D.
The magnitude of longitudinal strain is the same for tensile and compressive stress of equal magnitude
😑 View Answer Rough Work Error
ANSWER :
D. The magnitude of longitudinal strain is the same for tensile and compressive stress of equal magnitude
6.
A wire of Young's modulus Y, length L, and cross-sectional area A is stretched by a force F. The elongation produced is:
A.
ΔL = FA/(YL)
B.
ΔL = YL/(FA)
C.
ΔL = FL/(YA)
D.
ΔL = YAL/F
😑 View Answer Rough Work Error
ANSWER :
C. ΔL = FL/(YA)