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 …….

Options

A. Pt
B. `(Pt)/(M)`
C. Pt M
D. `(PM)/(t)`

Answer

B

Explanation

Heat lost `= ML = Pt`