engineering recuitment BARC Stipendiary Trainee Category I 2023 Mock Test Physics Nuclear Physics Radioactivity
A radioactive substance has a half-life period of ‘T’ years. The time taken for 6.25% of the original number of atoms to remain unchanged, when the substance has been undergoing decay is:
1
4T years
2
6T years
3
2T years
4
8T years