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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


No matter how detailed this question looks, the simple answer is - everything within an object will expand, if the object itself expands. On heating, x, r and d must all increase.


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