A solid iron ball is heated. Which one of the following will have a minimum percentage increase?

Surface area

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Volume

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Density

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Radius

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Solution

The correct option is C Density
The radius increment is linear expansion, which is directly proportional to change in temperature.
Similarly, changes in area and volume are directly proportional to change in temperature.
A change in density is inversely proportional to change in volume. So, the density will have a minimum percentage increase

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