Q. The graph between the instantaneous concentration $(N)$ of a radioactive element and time $(t)$ is
A)
B)
C)
D)
Explanation
(d) By using $N = N_{0}e^{- \lambda t}$ and $\frac{dN}{dt} = - \lambda N$
It shows that $N$ decreases exponentially with time
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.