28/03/2020 Deformation of Forces – Hooke's Law and Young's Modulus(Senior Class Physics Study by Topics) 28/03/2020 0Comments 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. The Y axis is used to plot which of the following Strain Stress 2. The area defined by the dotted line labeled A refers to Modulus of ductility Modulus of elasticity 3. A spring has a length of 9 cm when loaded with a 200 g mass. The extension-mass graph for the spring is shown. The 200g mass is replaced with a 100g mass. What is the new length of the spring? 7 cm 9 cm 8cm 10cm 4. The negative ratio between the lateral strain and the direct tensile strain is known as ______ Poisson’s ratio Elastic modulus Engineering strain True strain 5. A force is applied to a body. Which property of the body cannot be changed by the force? Its velocity Its shape Its mass Its size 6. A steel spring is stretched by a load. The load is increased. At first the extension is proportional to the load. The spring reaches its limit of proportionality at L. Which is the correct graph of the extension against load for the spring? B A C D 7. Which part of the graph shows the limit of proportionality for an elastic solid? O PQ OP P 8. An extension-load graph for a wire is shown. What is the load at the limit of proportionality for the wire? 4N 15N 60N 70N 9. 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 inversely proportional for all loads. At a certain load the wire becomes harder to extend. The load and extension are directly proportional for all loads. At a certain load the wire becomes easier to extend. 10. A solid having irregular arrangement of molecules is called polymeric crystalline amorphous ideal 11. The table shows how the extension of a spring varies with load. Between which two loads would you find the limit of proportionality? 14N and 16N 10N and 12N 8N and 10N 0N and 2N 12. 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? 54.4cm 39.7cm 29.9cm 33.4cm 13. If the material recovers the original dimensions, when an external load is removed, this deformation is known as ______ deformation. permanent elastic irreversible plastic 14. The yellow line indicates which of the following? Strength of ductility Modulus of elasticity Pre-fracture stress load 15. Array of points representing atoms, ions or molecules of a crystal arranged at different sites in a three-dimensional space is called Crystal lattice compound substance solid 16. What is the relation between shear modulus (G) and elastic modulus (E)? G = 0.35 E G = E G = 0.50 E G = 0.75 E 17. Line F indicates the area of Strain Ductility Elasticity Stress 18. Force applied on a unit area of a crystal is called elasticity Stress Flexibility strain 19. An extension-load graph is plotted to show the result of increasing the load on a spring. Which point marks the limit of proportionality for this spring? D B A C 20. The diagram shows how the length of a spring changes when a load of 10N is hung on it. The 10N load is replaced by a 20N load. What is the new length of the spring? 11cm 14cm 16cm 6 cm 21. Elastic modulus can’t be changed by ______ alloying heat treatment by increasing section thickness cold working 22. For higher intermolecular bond strength, value of elastic modulus is higher. False True 23. A metal wire, of initial length 1000mm, extends by 4mm when a load of 2N is added to it. What is the length of the wire when a further 3 N is added, assuming that the wire does not extend beyond the limit of proportionality? 1010mm 1006mm 1008mm 1012mm 24. Force per unit area that results from a load applied to the material defines Yield Stress Strain Young's modulus 25. 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 4cm 12cm 8cm 1 out of 25 Time is Up! Time's up