Organisation : SRM Valliammai Engineering College
Department : Electronics and Communication Engineering
Subject & Code : 1920103 & Engineering Physics
Semester : 1st
Year : 2020-21
Document Type : Question Bank
Website : https://srmvalliammai.ac.in/
SRM Valliammai ECE Question Bank
SRM Valliammai Engineering College, Electronics and Communication Engineering, Engineering Physics 2020-21 Semester 1 Question Bank
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Engineering Physics Question Bank
Part-A:
1. Define elasticity. BTL 2 Understanding
2. State Hooke’s law. BT L 2 Understanding
3. Define stress and strain with units. BTL 2 Understanding
4. Draw stress-strain diagram for brittle and ductile material. BT L 2 Understanding
5. What do you infer from stress and strain diagram? BT L 4 Analyzing
6. List the three modulii of elasticity. BT L 1 Remembering
7. What force is required to stretch a steel wire to double its length when its area of cross section is 2 cm2 and young’s modulus is 2 x 1011 N/m2 . Applying
8. An artificial denture with ultimate strength of 107 Nm-2 breaks when the jaws exerted a normal force of just 2N while eating. Estimate the area in which the force acted on the denture. BT L 3 Applying
9. An elastic wire is cut into half of its original length. How will it affect the maximum load the wire can support? BT L 4 Analyzing
10. What is Poisson’s ratio? BT L 1 Remembering
11. Define tensile strength. BT L 1 Remembering
12. List any two factors which affect elastic modulus and tensile strength
13. Two solid cylinders of same material having same radii with length l and 2 l are joined coaxially. Under an applied couple between free ends the shorter cylinder shows a twist of 20°. Calculate the angle of twist in longer cylinder. BT L 3 Applying
14. What is a beam? BT L 2 Understanding
15. What is Neutral axis? BT L 4 Analyzing
16. Give the moment of inertia expression for a rectangular and circular cross section of a beam. BT L 2 Understanding
17. Calculate the Young’s modulus of the material in the cantilever method. The length of cantilever beam is 1m which is suspended with a load of 150 gm. The depression is found to be 4 cm. The thickness of the beam is 5 mm and breadth is 3 cm. BT L 3 Applying
18. What is non-uniform bending and why is said to be non-uniform? BT L 1 Remembering
19. How will you reduce depression in an I-shaped girder? BT L 1 Remembering
20. When a wire is bent back and forth it becomes hot. Why? BT L 4 Analyzing
Part-B:
1. Draw stress – strain diagram and discuss the behavior of a ductile material under loading. (13) BT L 2 Understanding
2. Explain the factors which affect the elasticity of the material. (13) BT L 2 Understanding
3. Derive an expression for the couple per unit angular twist when a cylinder is twisted. (13) BT L 1 Remembering
4. (i) Derive an expression for twisting couple of a cylinder. (10)
(ii) A wire of length 1 m and diameter 1 mm is clamped at one of its ends. Calculate the couple required to twist the other end by 90°. Given modulus of rigidity = 298 GPa.
5. Derive an expression for the period of oscillation of a torsional pendulum. How it is used to determine the torsional rigidity of a wire? (13) BT L 2 Understand
6. Derive an expression for rigidity modulus of a wire using a torsion pendulum. (13) BT L 1 Remembering
7. What is meant by bending moment of a beam? Derive an expression for the bending moment of a beam. (13) BT L 1 Remembering
8. Derive an expression for the depression at the free end of a cantilever due to load. (13) BT L 1 Remembering
9. Derive with relevant theory how a cantilever can be used to determine the Young’s modulus of the material of a bar. (13) BT L 1 Remembering
10. Derive an expression for the elevation at the centre of a beam which is loaded at both ends. (13) BT L 1 Remembering
11. Derive an expression for Young’s modulus of a material by uniform bending method. (13) BT L 1 Remembering
12. Explain with necessary theory and experimental part the determination of Young’s modulus of the material of a beam supported at its ends and loaded in the middle. (13) BT L 2 Understanding
13. How will you determine the Young’s modulus of a material of a bar by non-uniform bending method? Explain the theory and experiment behind the determination of Young’s modulus. (13) BT L 2 Understanding
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