Physics · 2023
NEET 2023 · 7 May · Code E3 · Q30
The half life of a radioactive substance is 20 minutes. In how much time, the activity of substance drops to (1/16)^th of its initial value?
The half life of a radioactive substance is $\displaystyle 20$ minutes. In how much time, the activity of substance drops to $\displaystyle \left(\frac{1}{16}\right)^{\text {th }}$ of its initial value?
Official answer
From NTA’s final answer key for this paper.
(4)
$\displaystyle 80$ minutes
More from Nuclei
- Consider the following nuclear reaction: ^238 U →^234 Th+^4 He Take masses of ^238 U,^234 Th and ^4 He as…2026
- An unknown nucleus has a nuclear density of 2.29 × 10^17 kg / m^3 and mass of 19.926 × 10^-27 kg. Its mass…2026
- Four statements are given (A is mass number): A. The volume of a nucleus is proportional to A^1 / 3. B. The…2026
- _82^290 X →α Y →e^+ Z →β^- P →e^- Q In the nuclear emission stated above, the mass number and atomic number…2024
NEET (UG) 2023 Physics question, with the answer from NTA’s final answer key. Where our answers come from.