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Question 1 of 5
1. Question
4 pointsA refrigerator works between 4°C and 30°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 2016]
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Question 2 of 5
2. Question
4 pointsA piece of ice falls from a height h so that it melts completely. Only one-quarter of the heat produced is absorbed by the ice and all energy of ice gets converted into heat during its fall. The value of h is
[Latent heat of ice is 3.4 × 105 J/kg and g = 10 N/kg] [NEET 2016]Correct
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Question 3 of 5
3. Question
4 pointsAn ideal gas is compressed to half its initial volume by means of several processes. Which of the process results in the maximum work done on the gas? [AIPMT 2015]
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Question 4 of 5
4. Question
4 pointsHelium gas goes through a cycle ABCDA (consisting of two isochoric and isobaric lines) as shown in figure. Efficiency of this cycle is nearly : (Assume the gas to be close to ideal gas) [AIEEE 2012]
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Question 5 of 5
5. Question
4 points“Heat cannot by itself flow from a body at lower temperature to a body at higher temperature” is a statement or consequence of [AIEEE 2003]
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