Class 11 Physics — Chapter 9: Mechanical Properties of Solids
66 practice questions · 22 Easy · 22 Medium · 22 Hard
Practise Class 11 Physics Chapter 9, "Mechanical Properties of Solids", with 66 NCERT-aligned multiple-choice questions. The set is split into 22 Easy, 22 Medium and 22 Hard questions, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams, JEE Main, JEE Advanced and NEET UG.
"Mechanical Properties of Solids" is one of the chapters where numerical problem-solving, derivations and conceptual application really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+2 correct, −1 wrong, 0 skipped), training the same accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Mechanical Properties of Solids, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 11 Physics mastery score. A few sample questions are shown below; sign in free to practise all 66.
Key concepts: Mechanical Properties of Solids (Class 11 Physics)
This chapter covers elasticity — stress, strain, Hooke's law, the elastic moduli, and the elastic potential energy stored in a deformed solid.
- Stress & strain
- Stress is restoring force per unit area; strain is the fractional change in dimension (no units).
- Hooke's law
- Within the elastic limit, stress is proportional to strain; the ratio is the modulus of elasticity.
- Young's modulus
- Y = longitudinal stress / longitudinal strain; measures resistance to length change.
- Bulk & shear moduli
- Bulk modulus (volume change under pressure) and shear/rigidity modulus (shape change).
- Elastic energy
- Energy stored per unit volume = ½ × stress × strain.
Key formulas — Mechanical Properties of Solids
💡 Exam tips for Mechanical Properties of Solids
- Hooke's law (stress ∝ strain) holds only within the elastic limit — beyond it the material deforms permanently.
- A larger Young's modulus means a stiffer material (smaller strain for a given stress).
Sample questions
SI unit of Y:
Same as stress.
Young's modulus Y =
Y = σ/ε (linear elasticity).
Hooke's law is valid:
Linear regime only.
Mechanical Properties of Solids — FAQs
What are the key concepts in Class 11 Physics Mechanical Properties of Solids?+
This chapter covers elasticity — stress, strain, Hooke's law, the elastic moduli, and the elastic potential energy stored in a deformed solid. Key ideas include Stress & strain, Hooke's law, Young's modulus, Bulk & shear moduli, Elastic energy.
What does Class 11 Physics Chapter 9 (Mechanical Properties of Solids) cover on XamBaaz?+
It covers 66 NCERT-aligned MCQs on "Mechanical Properties of Solids" — 22 Easy, 22 Medium and 22 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams, JEE Main, JEE Advanced and NEET UG.
Are these "Mechanical Properties of Solids" questions free to practise?+
Yes — sign in with Google to practise "Mechanical Properties of Solids" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Mechanical Properties of Solids" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
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