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Questions  

A copper disc with a central hole is heated. The diameter of the hole:

a
increases
b
decreases
c
first decreases, then increases
d
remains unchanged

detailed solution

Correct option is A

In volumetric thermal expansion everything expands radially

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Similar Questions

A vessel having coefficient of cubical expansion γg contains liquid Of coefficient of real expansion rR up to certain level. When Vessel
Is heated, match column I and column II.
 

 Column - I Column - II
aγg<γRpliquid level rises continuously from beginning
bγg=γRqliquid level falls continuously from beginning
cγg>γRrliquid level remains same 
dγg=0sliquid level first falls and then rises 
 
 abcd
1srqp
2srpq
3qrsp
4rqps


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