Second Law Of Thermodynamics MCQ - Practice Questions with Answers
Edited By admin | Updated on Sep 25, 2023 25:23 PM | #NEET
Quick Facts
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Second Law of Thermodynamics is considered one of the most asked concept.
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4 Questions around this concept.
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EASY"Heat cannot by itself flow from a body at a lower temperature to a body at a higher temperature" is a statement or consequence of
It is impossible to obtain a continuous supply of energy by cooling body below the temperature of the surrounding is kelvin's statement for
Which of the following is incorrect regarding the first law of thermodynamics?
Directions: In this question, a word is represented by only one set of numbers as given in any one of the alternatives. The sets of numbers given in the alternatives are represented by two classes of alphabets as in the two matrices, given below. The columns and rows of Matrix (I) are numbered from 0 to 4 and that of Matrix (II) are numbered from 5 to 9. A letter from these matrices can be represented first by its row and next by its column, e.g. 'A' can be represented by 02, 10, etc., and 'B' can be represented by 57, 65, etc. Similarly, you have to identify the set for the word.
FADE
Concepts Covered - 1
Second Law of Thermodynamics
- Clausius's statement-It is impossible for a self-acting machine to transfer heat from a colder body to a hotter one
without the aid of an external agency.
- Kelvin’s statement-It is impossible for a body or system to perform continuous work by cooling it to a
a temperature lower than the temperature of the coldest one of its surroundings. - Kelvin-Planck’s statement-It is impossible to design an engine that extracts heat and fully utilizes it into work
without producing any other effect.
These above statements are completely equivalent to the Second Law of Thermodynamics.
This explains that the efficiency of an engine is always less than unity because heat cannot be fully converted into work.
It also explains that heat cannot flow from a body at a low temperature to one at higher temperatures unless work is done by an external agency.
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