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Byju's Answer
Standard X
Physics
Cubical Expansion
The substance...
Question
The substance which has negative coefficient of linear expansion is
A
Lead
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B
Aluminum
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C
Iron
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D
Invar steel
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Solution
The correct option is
A
Lead
Lead contracts on heating.
So it's length decreases
So
Δ
L is negative
So,
α
is negative
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