Q. A radioactive substance has an average life of 5h. In a time of 5 h
A) Half of the active nuclei decay
B) Less than half of the active nuclei decay
C) More than half of the active nuclei decay
D) All active nuclei decay
Explanation
(c) Average life = 5h, in one average life approximately 63 % radioactive nuclei decay.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.