JEE Main · Physics · Thermodynamics
Heat Engine Efficiency
JEE Main asked Heat Engine Efficiency once in the 108 shifts Lumi analysed, on 2 Sep 2020, Shift 2. It belongs to Heat Engines and Refrigerators, in Thermodynamics (Physics).
Updated 2026-10-24
- Times asked
- 1
- in 1 shift
- Years
- 1 of 8
- First asked
- 2020
- the only year
- Pattern
- Gone quiet
- asked once so far
Questions on this idea a shift, by year
2017–2026. Asked in 2020. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.
Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 0 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 0 in 8 shifts · 2026: 0 in 9 shifts.
Shift by shift
Each square is one analysed shift, in date order. Open a filled one for that paper.
How JEE Main framed it
Single correct is the usual form. Skill tested: calculation.
- Unknown heat from engine efficiency
Difficulty
The question was multiple choice.
Every question
The question
From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.
Shift: 2 Sep 2020, Shift 2.
Same topic
Other ideas in Heat Engines and Refrigerators
Heat Engines and Refrigerators has 8 ideas JEE Main has asked; 1 of them came up in more than one question.
- Carnot Efficiency Limit15× · 2023
- Carnot Engines in Seriesonce · 2022
- Carnot Heat-Temperature Ratioonce · 2022
- Refrigerator COPonce · 2021
- Carnot Refrigerator COP via Temperaturesonce · 2020
- Efficiency and COP Conversiononce · 2020
- Non-Carnot Cycle Efficiencyonce · 2020