Mechanical Properties of Solids
Karnataka Board · Class 11 · Physics
Flashcards for Mechanical Properties of Solids — Karnataka Board Class 11 Physics. Quick Q&A cards covering key concepts, definitions, and formulas.
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What is elasticity? Give an example.
Answer
Elasticity is the property of a body by virtue of which it tends to regain its original size and shape when the applied force is removed. Example: A helical spring that returns to its original length …
What is the difference between elasticity and plasticity?
Answer
Elasticity: Body regains original shape when force is removed (like spring). Plasticity: Body gets permanently deformed and doesn't return to original shape (like putty or mud).
Define stress and write its formula.
Answer
Stress is the restoring force per unit area developed in a body when it is deformed. Formula: Stress = F/A, where F is the applied force and A is the cross-sectional area. SI unit: N/m² or Pascal (Pa)…
What are the three types of stress? Define each briefly.
Answer
1. Tensile/Compressive stress (Longitudinal): Force applied normal to cross-section causing change in length. 2. Shearing stress: Force applied parallel to surface causing angular deformation. 3. Hydr…
Define longitudinal strain and write its formula.
Answer
Longitudinal strain is the change in length to the original length of the body. Formula: Longitudinal strain = ΔL/L, where ΔL is change in length and L is original length. It has no units (dimensionle…
What is shearing strain? Write its formula.
Answer
Shearing strain is the relative displacement between opposite faces to the length of the body. Formula: Shearing strain = Δx/L = tan θ ≈ θ (for small angles), where θ is angular displacement from vert…
Define volume strain and give its formula.
Answer
Volume strain is the ratio of change in volume to the original volume when a body is under hydraulic compression. Formula: Volume strain = ΔV/V, where ΔV is change in volume and V is original volume.
State Hooke's Law and write its mathematical form.
Answer
Hooke's Law states that within elastic limit, stress is directly proportional to strain. Mathematical form: Stress ∝ Strain or Stress = k × Strain, where k is the modulus of elasticity (proportionalit…
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Sources & Official References
- Karnataka SSLC — kseeb.kar.nic.in
- Dept of Pre-University Education, Karnataka
- National Education Policy 2020 — education.gov.in
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