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ALAGAPPA
UNIVERSITY
KARAIKUDI – 630 003
UNIT BASED ONLINE EXTERNAL EXAMINATION - NOVEMBER – 2020
FIRST
SEMESTER SLOT – I
PROPERTIES OF MATTER AND ACOUSTICS 7BPH1C1
Total Marks: 25 Time: 1.0 Hr
SECTION A – SHORT ANSWER - 5 x 2 = 10 Marks
ANSWER ALL THE QUESTIONS
1. Define
elasticity.
2. State Hooke’s
law.
3. Define
torsion of a body.
4. Define Poisson’s
ratio.
5. Contrast
stress and strain.
SECTION B - DESCRIPTIVE - 3 x 5 = 15 Marks
ANSWER ANY THREE
6. Discuss work
done in deforming a body.
7. Derive the
relation between three elastic moduli.
8. Derive the
expression for torque per unit twist of a cylindrical body.
9. Explain how
the torsion pendulum is used in finding rigidity modulus of a material.
10. Discuss
different moduli of elasticity.