NEET UG · Physics · Nuclei
Half-Life and Decay Constant
NEET asked Half-Life and Decay Constant once in 2017–2026, in 2023. It belongs to Radioactive Decay, in Nuclei (Physics).
Updated 2026-10-08
- Times asked
- 1
- in 2017–2026
- Papers
- 1
- of 10
- First asked
- 2023
- the only time
- Chance next paper
- 4%
- calibrated historical rate
Questions on this idea, by paper
2017–2026. 2023.
How NEET framed it
Numerical is the usual form. Skill tested: calculation.
- Numerical
Chance asked next paper 4%
Every question
The question
From the official NEET UG papers, newest first. Open one for the full question, the options and the official answer.
- 2023 Q28The half life of a radioactive substance is 20 minutes. In how much time, the activity of substance drops to…Numerical · Easy
Papers: NEET 2023.
Same topic
Other ideas in Radioactive Decay
Radioactive Decay has 9 ideas NEET has asked; 0 of them came up in more than one question.
- Decay Q-Value Calculationonce · 2026
- Balancing Nuclear Decay Equationsonce · 2024
- Beta Plus Decay Mechanismonce · 2022
- Alpha Emission Z and A Changesonce · 2021
- Fraction Remaining After n Half-livesonce · 2021
- Composition of Alpha Particlesonce · 2019
- Fraction Decayed vs Fraction Remainingonce · 2018
- Radioactive Decay Lawonce · 2017