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Saturday, 31 October

JEE Main · Physics · Thermodynamics

Carnot Refrigerator COP via Temperatures

JEE Main asked Carnot Refrigerator COP via Temperatures once in the 108 shifts Lumi analysed, on 3 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.

00.050.10’170.08’200’210’220’230’240’250’26

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.

  • 20260 of 9
  • 20250 of 8
  • 20240 of 18
  • 20230 of 12
  • 20220 of 24
  • 20210 of 24
  • 20201 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Numerical value is the usual form. Skill tested: multi-step.

  • Heat released by minimum-work refrigerator

Difficulty

Easy 0Medium 1Hard 0

1 of the 1 question had a numerical answer.

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.

  1. 3 Sep 2020, Shift 2 · Q23If minimum possible work is done by a refrigerator in converting 100 grams of water at 0∘0^\circC to ice, how much heat (in calories) is…MediumNumerical value

Shift: 3 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.

Topic analysisChapter analysisStudy this chapterAll repeated ideas