During summer, electrical wires sag due to _______.

anomalous expansion

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thermal expansion of liquids

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thermal expansion of solids

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thermal expansion of gases

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Solution

The correct option is C thermal expansion of solids
During summer, electrical wires sag due to thermal expansion of solids. The material of the wires expands thereby increasing in length, area, and hence, in volume.

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In summers, electric wires sag a little as ___________ on heating.

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