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Within the elastic limit, stress is dire...

Within the elastic limit, stress is directly proportional to strain produced in a body is the statement of

A

Robert's law

B

Hooke's law

C

Newton's law

D

Boyle's law

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The correct Answer is:
B
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Figure shows the relationship between tensile stress and strain for a typical material. Below proportional point A, stress is directly proportional to strain which means Young's moudulus (Y) is a constant. In this region the material obeys Hooke's law. Provided the strain is below the yield point 'B' the material returns to its original shape and size when the force is removed. Beyond the yield point, the material retains a permancnt deformation after the stress is removed. For stresses beyond the yeld point, the material exhibit plastic flow, which means that it continues to elongate for little increases in the stress. Beyond C a local constriction occurs. The material fractures at D (i.e. breaking point). The graph below shows the stress-strain curve for 4 different materials. Material which is good for making wires by stretching is

Figure shows the relationship between tensile stress and strain for a typical material. Below proportional point A, stress is directly proportional to strain which means Young's moudulus (Y) is a constant. In this region the material obeys Hooke's law. Provided the strain is below the yield point 'B' the material returns to its original shape and size when the force is removed. Beyond the yield point, the material retains a permancnt deformation after the stress is removed. For stresses beyond the yeld point, the material exhibit plastic flow, which means that it continues to elongate for little increases in the stress. Beyond C a local constriction occurs. The material fractures at D (i.e. breaking point). The graph below shows the stress-strain curve for 4 different materials. Material which is most brittle is

Figure shows the relationship between tensile stress and strain for a typical material. Below proportional point A, stress is directly proportional to strain which means Young's moudulus (Y) is a constant. In this region the material obeys Hooke's law. Provided the strain is below the yield point 'B' the material returns to its original shape and size when the force is removed. Beyond the yield point, the material retains a permancnt deformation after the stress is removed. For stresses beyond the yeld point, the material exhibit plastic flow, which means that it continues to elongate for little increases in the stress. Beyond C a local constriction occurs. The material fractures at D (i.e. breaking point). The graph below shows the stress-strain curve for 4 different materials. If you bough a new shoe which bites in the beginning and later on fits perfectly, then the material used to making the shoe is

NIKITA PUBLICATION-ELASTICITY-MCQ
  1. The change in dimensions per unit original dimensions is

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  2. When a spiral spring is stretched by suspending a load on it, the stra...

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  3. Within the elastic limit, stress is directly proportional to strain p...

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  4. Which of the following quantity is unitless ?

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  5. Within elastic limit, which of the following graphs correctly represen...

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  6. Fluids can develop

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  7. According to Hooke's law, the force required to change the length of a...

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  8. Under elastic limit the stess is

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  9. Breaking stress does not depend upon

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  10. The breaking stress of a wire depends on

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  11. The nature of elastic forces by virtue of which a body possess the pro...

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  12. The breaking stress is

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  13. The ratio of adiabatic and isothermal bulk modulus of elasticity for a...

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  14. A metal bar of length L and area of cross-section A is clamped between...

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  15. The load versus extension graph for four wires of same material is sh...

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  16. The graph is plotted between load and extension of the wires of same d...

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  17. A Copper wire and steel of the same diameter and length are connected...

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  18. An iron bar of length l cross section 'A' and young's modulus Y is pu...

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  19. Equal stretching force is applied along the length of two identical wi...

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  20. The longitudinal extention of any elastic material is very small.In or...

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