Prepare for NEET Physics Mechanical Properties Of Solids with MCQs & PYQs on NEET.GUIDE. Get free practice, previous year questions, and expert solutions to improve your problem-solving skills.
Which modulus describes a material's resistance to shearing stress?
Young's modulus
Bulk modulus
Rigidity modulus
Poisson's ratio
For most materials, the value of Poisson's ratio (σ) lies between:
-1 and 0
0 and 0.5
0.5 and 1
1 and 2
A wire of length L and cross-sectional area A is stretched by a force F. If the Young's modulus of the wire is Y and the bulk modulus is K, what is the rigidity modulus (η) of the wire?
η = 9YK / (3K + Y)
η = 3YK / (9K + Y)
η = YK / (3K + Y)
η = 3YK / (K + 3Y)
If the bulk modulus of a material is twice its rigidity modulus, then the Poisson's ratio is:
1/2
1/3
2/7
1/4
For a perfectly incompressible material, the bulk modulus (K) is:
Zero
One
Infinite
Equal to Young's modulus
Which of the following relationships is correct for an isotropic elastic material?
If a material has a Poisson's ratio of 0.5, what can be inferred about its compressibility?
It is highly compressible.
It is slightly compressible.
It is incompressible.
Its compressibility cannot be determined from Poisson's ratio.
The Young’s modulus (Y) of a material is related to its rigidity modulus (η) and bulk modulus (K) by the equation:
A wire of length L and radius r is subjected to a tensile stress . If Young's modulus is Y and the Poisson's ratio is $
u$, the decrease in radius is given by:
$\frac{\sigma r
u}{Y}$
$\frac{\sigma r}{
u Y}$
$\frac{\sigma
u}{rY}$
