A substance of mass m kg requires a power input of P watts to remain in the molten state at its melting point. When the power is turned off, the sample completely solidifies in time t sec. What is the latent heat of fusion of the substance
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Heat lost in t sec = mL or heat lost per sec = 
. This must be the heat supplied for keeping
the substance in molten state per sec.
∴ ∴ 
or 
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