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Q.

The diagram shows a force-extension graph for a rubber band. Consider the following statements :
I. It will be easier to compress this rubber than expand it. 
II. Rubber does not return to its original length after it is stretched. 
Ill. The rubber band will get heated if it is stretched and released. 
    Which of these can deduced from the graph?

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a

Ill only 

b

II and III 

c

I and Ill 

d

I only

answer is A.

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Detailed Solution

Area of hysterisis loop gives the energy loss in the process of stretching and unstretching of rubber band and this loss will appear in the form of heating.

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