Stress, Strain and Moduli: A Mechanical Properties Challenge
One tricky NEET-style question on Young's modulus, bulk modulus and modulus of rigidity. Can you pick the right one without second-guessing yourself?
All three elastic moduli live in the same chapter, but NEET loves to test whether you really know which deformation each one describes. This question is about exactly that boundary.
The question
Two statements are made about the elastic moduli of a solid material.
Statement I: The bulk modulus is the only elastic modulus that applies to both solids and fluids.
Statement II: The modulus of rigidity (shear modulus) is defined as the ratio of shearing stress to the shearing strain, and it is zero for a fluid because a fluid cannot sustain a shear stress.
Which of the following is correct?
- (A) Statement I is true and Statement II is false.
- (B) Statement I is false and Statement II is true.
- (C) Both Statement I and Statement II are true.
- (D) Both Statement I and Statement II are false.
Before you peek
Think carefully about what NCERT says each modulus requires, and which states of matter can sustain each type of stress. The answer and full explanation appear on this page next week.
Answer revealed on at 7:00 am IST. Work it out first. Bookmark this page and come back then.
Sources
- NCERTNCERT Class 11 Physics, Chapter 8: Mechanical Properties of Solids
Think something here is wrong? Email us and we will check it against NCERT.
