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A uniform metal sheet has a hole in its centre. What happens to hole when the sheet is uniformly heated?

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A uniform metal sheet has a hole in its centre. What happens to hole when the sheet is uniformly heated?

(a) Its size increases

(b) Its size decreases

(c) It changes shape

(d) Remains the same size

This question was posed to me in semester exam.

I'd like to ask this question from Thermal Expansion in section Thermal Properties of Matter of Physics – Class 11

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Right option is (a) Its size increases

The explanation: The hole’s circumference is made of metal. When the sheet is heated this circular circumference will expand and therefore the size of hole will increase. The hole will not get deformed as the sheet is uniform in all directions from the centre of hole and is also heated uniformly.

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