1.

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. `(Pt)/(piM)`B. `(2pt)/(piM)`C. `(pt)/(M)`D. `(pt)/(2M)`

Answer» pt=heat lost in time t=mL
`L=(pt)/(M)`


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