Two metal plates P and Q of the same material | vedclass

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(B) When a metal plate is heated,it undergoes thermal expansion,which means all its dimensions increase in proportion to the original length.This is e

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Both $x$ and $y$ decrease

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(B) When a metal plate is heated,it undergoes thermal expansion,which means all its dimensions increase in proportion to the original length.This is equivalent to a photographic enlargement of the object.In the given figure,the gaps $x$ and $y$ are essentially empty spaces defined by the boundaries of the metal plates.As the plates expand upon heating,the material of the plates moves into the space previously occupied by the gaps.Since the entire plate expands uniformly,the boundaries defining the gaps $x$ and $y$ move towards each other.Therefore,the dimensions of the gaps $x$ and $y$ will decrease as the temperature increases.

Two metal plates $P$ and $Q$ of the same material are arranged as shown in the figure. If both the plates are uniformly heated through the same range of temperature,then

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