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A substance of mass M kg requires a power input of P wants to remain in the molten state at its melting point. When the power source is turned off, the sample completely solidifies in time t seconds. The latent heat of fusion of the substance is …….A. `(Pm)/(t)`B. `(Pt)/(m)`C. `(m)/(Pt)`D. `(t)/(Pm)` |
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Answer» Correct Answer - D Self energy of solid sphere `E=-(3)/(5)(GM^(2))/(R )` and mass `M=(4)/(3)piR^(3)p " "therefore E prop R^(5)` |
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