A Carnot engine has an efficiency of 50% when its source is at a temperature \(327^\circ\) C. The temperature of the sink is :
Second law, reversible and irreversible processes
Every question from past board papers on Second law, reversible and irreversible processes, newest paper first. Open any question for its full worked answer.
NEET UG 2023 question paper (official, booklet G6)
Full paper →NEET UG 2018 question paper (official, booklet EE)
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The efficiency of an ideal heat engine working between the freezing point and boiling point of water, is
NEET UG 2017 question paper (official, booklet B)
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A carnot engine having an efficiency of \(\frac{1}{10}\) as heat engine, is used as a refrigerator. If the work done on the system is 10 J, the amount of energy absorbed from the reservoir at lower temperature is :
NEET UG 2016 Phase 1 question paper (official, booklet A)
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A refrigerator works between \(4^\circ C\) and \(30^\circ C\). It is required to remove 600 calories of heat every second in order to keep the temperature of the refrigerated space constant. The power required is : (Take 1 cal = 4.2 Joules)
NEET UG 2016 Phase 2 question paper (official, booklet ZZ)
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The temperature inside a refrigerator is \(t_2\)°C and the room temperature is \(t_1\)°C. The amount of heat delivered to the room for each joule of electrical energy consumed ideally will be