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Q.

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.Assertion A: when a rod lying freely is heated, no thermal stress is developed in itReason R : On heating, the length of the rod increasesIn the light of the above statements, choose the correct answer from  the options given below:

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a

A is true but R is false

b

Both A and B are true but R is NOT the correct explanation of A

c

Both A and R are true and R is the correct explanation  of A

d

A is false but R is true

answer is B.

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Detailed Solution

Stress is developed only if the expansion is hindered both A and R are true but Reason not the correct explanation of A
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