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Question

In the case of expansion of solids, match the type of expansions with the effects.

A
change in volume
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B
change in area
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C
change in length
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Solution

When solids are heated, there is an increase in their temperature along with the increase in their length, breadth and thickness.
When a substance in the form of wire or rod is heated, its length increases and this is termed as linear expansion.
When a metal plate is heated, its length and breadth both increase. This increases the area and is called as superficial expansion.
When a cube is heated, it expands in all the directions i.e. its length, breadth and thickness increase. This change in volume is called cubical expansion.

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