A substance of mass $m\,kg$ requires a power input of $P$ $watt$ to remain in the molten state at its melting point. When the power is turned off, the substance completely solidifies in time $t\,sec$. The latent heat of fusion of the substance is
A substance of mass $m\,kg$ requires a power input of $P$ $watt$ to remain in the molten state at its melting point. When the power is turned off, the substance completely solidifies in time $t\,sec$. The latent heat of fusion of the substance is
- A
$\frac{{Pm}}{t}$
- B
$\frac{{Pt}}{m}$
- C
$\frac{{m}}{Pt}$
- D
$\frac{{t}}{Pm}$
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