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Q.

There are two spheres of same material and radius. One is solid and the other is hollow. If they are heated to the same temperature the expansion of :

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a

solid and hollow spheres are equal

b

solid sphere is more

c

solid is outwards while that of hollow inwards

d

hollow sphere is more
 

answer is C.

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Detailed Solution

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The volume of cavity increases radially outward so as to match the volume expansion of solid sphere when increase in temperature is same for both.

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