Q. A radioactive element A decay into stable element B, initially a fresh sample of A is available. In this sample variation in number of nuclei of B with time is shown by
A) [image:13_image15.emf]
B) [image:13_image16.emf]
C) [image:13_image17.emf]
D) [image:13_image18.emf]
Explanation
(b) $N = N_{0}e^{- \lambda t}$
Variation of $N$ is exponential
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.