A thin cylindrical metal rod is bent int...

A thin cylindrical metal rod is bent into a ring with a small gap as shown in figure. On heating the system

`theta` decreases,r and d increases

`theta` increases

d & r increases

`theta` is constant,

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The correct Answer is:

C, D

`d'=d(1+alphaDeltaT) alpha=+ive` (coefficient of linear expansion)
`r'=r(1+alphaDeltaT) alpha =+ive` (coefficient of linear expansion)

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