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Thermal Expansion

Two holes of ...

Question

Two holes of unequal diameters $d_{1}$ and $d_{2}$ $(d_{1} > d_{2})$ are cut in a metal sheet. If the sheet is heated

Both $d_{1}$ and $d_{2}$ will decrease

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Both $d_{1}$ and $d_{2}$ will increase

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$d_{1}$ will increase $d_{2}$ will decrease

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$d_{1}$ will decrease $d_{2}$ will increase

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Solution

The correct option is B
Both $d_{1}$ and $d_{2}$ will increase

If the sheet is heated then both $d_{1}$ and $d_{2}$ will increase since the thermal expansion of isotropic solid is similar to true photographic enlargement.

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