Thermodynamics – Second Law, Heat Engines, Carnot Cycle, Refrigerators
Physics · Grade 11 · Week 32 · 25 questions
Thermodynamics is a foundational Grade 11 physics chapter that covers Second Law, Heat Engines, Carnot Cycle, and Refrigerators. These concepts reappear throughout Grade 12 and in competitive exams like JEE and NEET.
What you'll practise
- State and apply Second Law
- Derive Heat Engines
- Explain Carnot Cycle
- Apply thermodynamics concepts to NCERT exercise and exemplar problems
All 25 questions in this Thermodynamics – Second Law, Heat Engines, Carnot Cycle, Refrigerators quiz
Grade 11 Physics — Thermodynamics – Second Law, Heat Engines, Carnot Cycle, Refrigerators: 25 practice questions with instant scoring and explanations.
- Second law of thermodynamics (Kelvin-Planck):
- Clausius statement:
- Efficiency of heat engine η = :
- Carnot engine efficiency η_Carnot = :
- Carnot engine operates between two temperatures with:
- Max possible efficiency of engine between T₁ and T₂ (T₂<T₁):
- A heat engine working between 500 K and 300 K has max efficiency:
- Refrigerator COP β = :
- Carnot refrigerator COP:
- Heat pump COP:
- Perpetual motion machine of second kind violates:
- Entropy change for reversible process ΔS = :
- In all spontaneous processes, total entropy:
- SI unit of entropy:
- Entropy is a measure of:
- Efficiency of actual heat engine compared to Carnot:
- Carnot's theorem: all reversible engines between same temperatures have:
- In a reversible cycle, ΔS_universe = :
- For cyclic process, ΔS_system = :
- A heat engine takes 1000 J from hot and rejects 600 J to cold. W = :
- η of that engine:
- Impossibility of 100% efficient engine is due to:
- A Carnot engine's working substance can be any:
- If T_cold = T_hot, Carnot efficiency:
- Otto cycle is used in:
Question 1 of 250 correct so far