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Elasticity

Elasticity is...

Question

Elasticity is the property of a matter to:

A

Get stretched as much as possible

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B

Regain it's shape after getting deformed.

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C

Get deformed, on application of an external load.

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D

None of the above.

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Solution

The correct option is B Regain it's shape after getting deformed.
As we discussed elasticity is the property fo a matter to regain it's shape after getting deforced; on the application of an external load.

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Q. Match the Column I with Column II

Column I	Column II
(A) A body which regains its original shape after the removal of external forces	(p) Elasticity
(B) A body which does not regain its original shape after the removal of external forces.	(q) Elastic body
(C) A body which does not show any deformation on applying external forces	(r) Plastic body
(D) The property of the body to regain its original configuration when the deforming forces are removed.	(s) Rigid body

Q. Consider the following statements.
1. If a body completely gains its original shape after removal of forces, it is elastic body.
2. The property to restore the natural shape of a body is elasticity.
3. When a body partially regains its original shape after removal of deforming force it is partially elastic.
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Q. Materials get deformed when force is applied. Some of them regain their status when the applied force is removed. They are termed as elastic. Those of which not regaining are called plastic. There may be delay in the regaining in some materials. They are said to have got elastic aftereffect, since they have gone beyond the elastic limit. Repeated application and removal of force break at any point time and so are avoided.
The stress strain graph for two materials

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B

is shown in the following figure:
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A

B

E_{A}

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