Questions
A substance of mass m 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?
detailed solution
Correct option is B
Heat lost in t sec = mL or heat lost per sec = mLt. This must be the heat supplied for keeping the substance in molten state per sec.mLt = P or L = PtmTalk to our academic expert!
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