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

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

A cylindrical metal rod of length L_(0) is shaped into a ring with s small gap is shown in figure. On heating the system.

A small ring having small gap is shown in figure on heating what will happen to size of gap.

A small ring having small gap is shown in figure on heating what will happen to size of gap.

A circular metallic disc of radius R has a small circular cavity of radius r as shown in figure. On heating the system

A circular metallic disc of radius R has a small circular cavity of radius r as shown in figure. On heating the system :

A circular metallic disc of radius R has a small circular cavity of radius r as shown in figure. On heating the system

A long metal rod is bent to form a ring with a small gap if this is heated, will this gap increase or decrease?