Physics · JEE

The second law of thermodynamics: reversible and irreversible processes Concepts for JEE

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Concept explainer

The second law of thermodynamics: reversible and irreversible processes is a core JEE Main Physics subtopic under Thermodynamics. Master the definitions, standard results, and typical MCQ patterns tested in JEE Main and Advanced.

Key points

Understand the definition and scope of The second law of thermodynamics: reversible and irreversible processes in the JEE syllabus
Memorise key formulas and standard results linked to The second law of thermodynamics: reversible and irreversible processes
Practise 20–40 syllabus-aligned MCQs with step-by-step solutions

JEE tips

Revise The second law of thermodynamics: reversible and irreversible processes with a one-page formula sheet before attempting mixed tests
After each practice set, log mistakes specific to The second law of thermodynamics: reversible and irreversible processes and reattempt after 48 hours

Common trap

Students often rush The second law of thermodynamics: reversible and irreversible processes questions without checking units, sign conventions, or boundary conditions — always verify assumptions before calculating.

Syllabus context

Part of Thermodynamics in JEE Main Physics.

Free sample questions

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Q1PhysicsUnit 8: Thermodynamics

Assertion In an ideal thermodynamically reversible process, the energy from work performed by or on the system would be maximized, and that from heat would be minimized. Reason A reversible process is a process whose direction can be "reversed" by inducing infinitesimal changes to some property of the system via its surroundings, while not increasing entropy.

Q2PhysicsUnit 8: Thermodynamics

Natural processes are:

Q3PhysicsUnit 8: Thermodynamics

From below which are the disadvantages of nuclear energy?

Q4PhysicsUnit 8: Thermodynamics

Assertion Reversible systems are difficult to find in real world. Reason Most processes are dissipative in nature.

Q5PhysicsUnit 8: Thermodynamics

A process is said to be reversible if:

Q6PhysicsUnit 8: Thermodynamics

Which of the process is the reversible process?

Q7PhysicsUnit 8: Thermodynamics

A reversible process changes the state of a system in such a way that the net change in the combined entropy of the system and its surroundings is :

Q8PhysicsUnit 8: Thermodynamics

A reversible engine takes heat from a reservoir at

527^{\circ} \mathrm{C}

and gives out heat to

a \sin k

127^{\circ}

C. How many Joules/s must it take from the reservoir to perform useful mechanical work at the rate of

750 W ?

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Frequently asked questions

What concepts in The second law of thermodynamics: reversible and irreversible processes are essential for JEE?

Focus on core ideas across The second law of thermodynamics: reversible and irreversible processes. JEE tests application, not just memorisation.