JEE Main · Physics · Thermodynamics
First Law Energy Balance
JEE Main asked First Law Energy Balance 3 times in 3 of the 108 shifts Lumi analysed, in 2021, 2023 and 2024. It belongs to First Law of Thermodynamics, in Thermodynamics (Physics). The longest wait between two years asking it was 2 years.
Updated 2026-10-24
- Times asked
- 3
- in 3 shifts
- Years
- 3 of 8
- First asked
- 2021
- last in 2024
- Pattern
- Comes in cycles
- across the analysed shifts
Questions on this idea a shift, by year
2017–2026. Asked in 2021, 2023 and 2024. 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: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 0 in 24 shifts · 2023: 1 in 12 shifts · 2024: 1 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.
- Work done from heat and temperature rise of helium
- First law applied to rates of heat and work
Difficulty
Every question was multiple choice.
Every question
All 3 questions
From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.
- 6 Apr 2024, Shift 2 · Q39A total of 48 J heat is given to one mole of helium kept in a cylinder. The temperature of helium increases by . The…EasySingle correct
- 6 Apr 2023, Shift 1 · Q44A source supplies heat to a system at the rate of 1000 W. If the system performs work at a rate of 200 W. The rate at which internal…EasySingle correct
- 26 Aug 2021, Shift 1 · Q4An electric appliance supplies 6000 J/min heat to the system. If the system delivers a power of 90 W. How long it would take to increase…EasySingle correct
Shifts: 26 Aug 2021, Shift 1, 6 Apr 2023, Shift 1, 6 Apr 2024, Shift 2.
Same topic
Other ideas in First Law of Thermodynamics
First Law of Thermodynamics has 21 ideas JEE Main has asked; 10 of them came up in more than one question. The 12 most asked are below.
- Heat in Isochoric and Isobaric Processes5× · 2026
- Internal Energy Calculation4× · 2026
- Work and Heat in Isothermal Processes4× · 2025
- Mayer's Relation (Cp and Cv)3× · 2026
- Isothermal Bulk Modulus2× · 2026
- Adiabatic P-V Relation2× · 2024
- First Law in Phase Transitions2× · 2023
- Molar Heat Capacity in Polytropic Processes2× · 2022
- Work Done from P-V Graph Area2× · 2022
- Adiabatic Work Formulaonce · 2026
- State vs. Path Functionsonce · 2026
- Work and Internal Energy in Adiabatic Processesonce · 2026