JEE Main · Physics · Nuclei
Q-Value Sign Convention
JEE Main asked Q-Value Sign Convention once in the 108 shifts Lumi analysed, on 3 Apr 2025, Shift 1. It belongs to Fission and Fusion, in Nuclei (Physics).
Updated 2026-10-24
- Times asked
- 1
- in 1 shift
- Years
- 1 of 8
- First asked
- 2025
- the only year
- Pattern
- New since 2024
- asked once so far
Questions on this idea a shift, by year
2017–2026. Asked in 2025. 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: 0 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 1 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
Match the list is the usual form. Skill tested: conceptual.
- Match list on nuclear reaction types
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: 3 Apr 2025, Shift 1.
Same topic
Other ideas in Fission and Fusion
Fission and Fusion has 7 ideas JEE Main has asked; 2 of them came up in more than one question.
- Nuclear Fission Mechanics2× · 2024
- Q-Value of a Reaction2× · 2024
- Energy Density Comparisononce · 2024
- Fission Fragment Kinematicsonce · 2024
- Mass Defect to MeV Conversiononce · 2024
- Reactor Power Calculationonce · 2020