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Assertion : Lead is more elastic than rubber.

Reason : If the same load is attached to lead and rubber wires of the same cross-sectional area, the strain of lead is very much less than that of rubber.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

Sarthaks Test For Class 7-12

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Correct option (a) Both A and R are true and R is the correct explanation of A

Explanation :

Y = stress/strain. 

Since strain caused is lesser for lead, it is more elastic .

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