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Q.

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

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a

Data insufficient to arrive at a conclusion

b

x decreases, r and d increase

c

x and r increase, d decreases

d

x, r and d all increase

answer is C.

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Detailed Solution

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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