Mechanical Properties of Solids MCQs
Mechanical Properties of Solids MCQs
Class: CBSE Class 11
Subject: Physics
Section: Properties of Bulk Matter
Topic: Mechanical Properties of Solids MCQs
Board: CBSE Board Examination (Strictly NCERT Based)
Subject: Physics
Section: Properties of Bulk Matter
Topic: Mechanical Properties of Solids MCQs
Board: CBSE Board Examination (Strictly NCERT Based)
Q1. Stress is defined as:
Answer: B
Explanation: Stress = Internal restoring force per unit area.
Explanation: Stress = Internal restoring force per unit area.
Q2. SI unit of stress:
Answer: B (Pascal)
Explanation: 1 Pa = 1 N/m².
Explanation: 1 Pa = 1 N/m².
Q3. Strain is:
Answer: A
Explanation: Ratio of change in dimension to original dimension.
Explanation: Ratio of change in dimension to original dimension.
Q4. Hooke’s law valid within:
Answer: A
Explanation: Stress ∝ Strain within elastic limit.
Explanation: Stress ∝ Strain within elastic limit.
Q5. Young’s modulus =
Answer: A
Explanation: Y = Longitudinal stress / Longitudinal strain.
Explanation: Y = Longitudinal stress / Longitudinal strain.
Q6. Unit of Young’s modulus:
Answer: Pascal.
Q7. Bulk modulus relates to:
Answer: Volume change.
Q8. Shear modulus relates to:
Answer: Shape change.
Q9. Poisson’s ratio value range:
Answer: 0 to 0.5.
Q10. Steel has high:
Answer: Young’s modulus.
Q11. Stress proportional to strain graph:
Answer: Straight line.
Q12. Breaking stress means:
Answer: Stress at fracture.
Q13. Elastic behaviour due to:
Answer: Interatomic forces.
Q14. Strain unit:
Answer: No unit.
Q15. Hydraulic press uses:
Answer: Bulk modulus principle.
Q16. Wire elongation depends on:
Answer: Length & force.
Q17. Thicker wire elongation:
Answer: Less.
Q18. Energy stored in stretched wire:
Answer: Elastic potential energy.
Q19. Stress dimension:
Answer: ML⁻¹T⁻².
Q20. Young’s modulus measures:
Answer: Stiffness.
Q21. Rubber has:
Answer: Low Young’s modulus.
Q22. Shear stress changes:
Answer: Shape only.
Q23. Elastic limit exceeded:
Answer: Permanent deformation.
Q24. Stress–strain curve area gives:
Answer: Elastic energy.
Q25. Unit of bulk modulus:
Answer: Pascal.
Q26. Compressibility inverse of:
Answer: Bulk modulus.
Q27. Glass is:
Answer: Brittle.
Q28. Steel is:
Answer: Ductile.
Q29. Maximum strain before break:
Answer: Breaking strain.
Q30. Elastic recovery means:
Answer: Regaining original shape.
