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Question
A circular disc of copper has a symmmetrical hole at its centre. The disc is uniformly heated. The diameter of the hole will
A circular disc of copper has a symmmetrical hole at its centre. The disc is uniformly heated. The diameter of the hole will
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Solution
The correct option is A increase
The concept of linear thermal expansion indicates that the metal (or other solid material) expands when heated. In particular, the expansion occurs such that the distance between any two points on the metal plate increases by same ratio. For eg- the distance between two adjacent corners, between two diadonal corners, or a diameter across the hole increases.
The concept of linear thermal expansion indicates that the metal (or other solid material) expands when heated. In particular, the expansion occurs such that the distance between any two points on the metal plate increases by same ratio. For eg- the distance between two adjacent corners, between two diadonal corners, or a diameter across the hole increases.
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