JEE Main · Physics · Thermodynamics
Efficiency and COP Conversion
JEE Main asked Efficiency and COP Conversion once in the 108 shifts Lumi analysed, on 8 Jan 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.
- Heat absorbed by carnot refrigerator 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: 8 Jan 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
- Heat Engine Efficiencyonce · 2020
- Non-Carnot Cycle Efficiencyonce · 2020