when a copper sphere is heated, maximum percentage change will be observed in (1) radius (2) area (3) volume (4) none of these

 Answer: (3) volume


Change in radius =rΔr=X

Change in area =Δ(4πr2/(4πr2)


= 2Δr/r


Change in Volume =Δ(4/3πr3/(4/3πr3)


= 3Δr/r

= 3X

Thus change in volume is maximum.

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