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Manipal Entrance Test 2014 Physics Paper

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Question : 50

Total: 60

Two litre of water at initial temperature of 27°C is heated by a heater of power 1 kW. if the lid of kettle is opened, then heat is lost at the constant rate of 160 J/s. Find, the time required to raise the temperature of water to 77°C with the lid open (specific heat of water 4.2 kJ/kg)

5 min 40 s
14 min 20 s
8 min 20 s
16 min 10 s

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