Question bank/JEE Main/Physics

An object of melting point [IMAGE] is at
temperature of [IMAGE] initially. When
[IMAGE] amount of heat is supplied to it then find its
temperature. If it is known that heat is
required to completely melt it and the ratio of specific heat to latent
heat is 1: 240

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Let specific heat =S
Latent heat = 240 s
$$2\theta = m(240s) + ms(120) = 360ms$$
[IMAGE] Only '120ms' of heat is required to increase
temp of object to its melting point. Hence final temp is
TOPIC:Thermometry
SUB TOPIC:Heat transfer

Source: Grass-G / Ph-28 Physics paper FST 16 Jan.docx