A cylindrical metal rod of length $L‌‌_0$ is shaped into a ring with a small gap as shown. On heating the system

63-27

  • A

    $x$ decreases, $r$ and $d$ increase

  • B

    $x$ and $r$ increase, $d$ decreases

  • C

    $x$, $r$ and $d$ all increase

  • D

    Data insufficient to arrive at a conclusion

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