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Question

A cylindrical metal rod of length L0 is shaped into a ring with a small gap as shown. On heating the system

A
x decreases, r and d increase
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B
x and r increase, d decreases
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C
x, r and d all increase
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D
Data insufficient to arrive at a conclusion
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Solution

The correct option is C x, r and d all increase
On heating the system; x, r, d all increases, since the expansion of isotropic solids is similar to true photographic enlargement

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