In a steel factory it is found that to maintain M kg of iron in the molten state at its melting point an input power P watt is required. When the power source is turned off, the sample completely solidifies in time t second. The latent heat of fusion of iron is
Text Solution
Verified by ExpertsThe correct answer is:
C
Heat lost in 
or heat lost per sec 
This must be the heat supplied for keeping the substance in molten state per sec.
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