28/03/2020 Deformation of Forces – Hooke's Law and Young's Modulus(Senior Class Physics Study by Topics) 28/03/2020 16Comments by Gate Academy Welcome to your Deformation of Solids - Hookes Law and Youngs Modulus(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. Force applied on a unit area of a crystal is called elasticity Flexibility strain Stress 2. A spring extends by 4 cm when 10 N is suspended from it. Two of these springs are used as shown to carry a 30N load. What is the extension of each spring? 6cm 8cm 12cm 4cm 3. By altering composition or heat treatment, elastic modulus can be increased to very high orders. True False 4. What is atomic density on prismatic plane? 2/√3a² 2/a² 2/ac 1/a² 5. The area defined by the dotted line labeled A refers to Modulus of elasticity Modulus of ductility 6. A 100 g mass is suspended from a spring next to a vertical metre rule. The top of the spring is level with the 0.0cm mark. The bottom of the spring is level with the 27.2cm mark. The 100g mass is replaced with a 600g mass. The length of the spring is now 89.7cm. The spring has not reached the limit of proportionality. The 600g mass is replaced with a 200g mass. What is the length of the spring? 39.7cm 54.4cm 33.4cm 29.9cm 7. Line F indicates the area of Strain Ductility Stress Elasticity 8. A load L is suspended from two springs that are in parallel. The extension of each spring is x. In this new arrangement, what is the total extension of the two springs? 2x x 1/2 of x 4x 9. What is the relation between shear modulus (G) and elastic modulus (E)? G = 0.35 E G = E G = 0.75 E G = 0.50 E 10. Yielding is a type of failure. True False 11. Material D demonstrates which of the following properties Strong but not ductile Brittle Plastic Ductile 12. Which object behaves as an elastic solid as it deforms? A football as it is kicked A bullet as it hits a solid metal wall A piece of metal cut by a saw A car damaged in a collision 13. The yellow line indicates which of the following? Modulus of elasticity Strength of ductility Pre-fracture stress load 14. Compressibility is reciprocal of _____ Bulk modulus Poisson’s ratio Elastic modulus Shear modulus 15. A spring extends by 6.0cm when a 15N weight is suspended from its lower end. Three of these springs are used as shown to support a 90N weight. What is the extension of each spring? 2.0cm 36cm 110cm 12cm 16. A solid having irregular arrangement of molecules is called amorphous crystalline polymeric ideal 17. The ratio of volumetric stress to volumetric strain is called Shear strain Young's modulus Bulk modulus Shear modulus 18. The table shows how the extension of a spring varies with load. Between which two loads would you find the limit of proportionality? 0N and 2N 10N and 12N 14N and 16N 8N and 10N 19. In compression, there is both a uniform stress distribution and a uniaxial state of stress until buckling. False True 20. A stress that changes one dimension only is called Volumetric stress Linear stress compressive stress Linear strain 21. What is the expression for bulk modulus? E/3(1 + v) E/2(1 + v) E/ (1 – 2v) E/3(1 – 2v) 22. For higher intermolecular bond strength, value of elastic modulus is higher. False True 23. The graph shows the extension of a piece of copper wire as the load on it is increased. What does the graph show? The load and extension are directly proportional for all loads. The load and extension are inversely proportional for all loads. At a certain load the wire becomes easier to extend. At a certain load the wire becomes harder to extend. 24. Which part of the graph shows the limit of proportionality for an elastic solid? PQ P O OP 25. If the material recovers the original dimensions, when an external load is removed, this deformation is known as ______ deformation. irreversible elastic plastic permanent 1 out of 25 Time is Up! Time's up
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