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Questions  

Radii of two steel spheres A and B are in the ratio 1:3. If same quantity of heat is supplied to the spheres, ratio of the rise of temperature of A and B is 

a
1:243
b
1:9
c
81:1
d
27:1

detailed solution

Correct option is D

mA.S.ΔtA=mB.S.ΔtB=Q⇒ΔtAΔtB=mBmA=43π(rB)343π(rA)3=(3)3=27

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