For a certain radioisotope the straight-line graph of against time passes through the…

PHYSICS · Multi-part · CBSE · Physics · Nuclei · Nuclei

Problem

For a certain radioisotope the straight-line graph of

\ln N

against time passes through the points

(t=0\,\text{s},\,\ln N=22)

and

(t=40\,\text{s},\,\ln N=20)

. (a) Calculation of

\lambda

from graph points (b) Determination of half-life (c) Number of nuclei after

2.0\text{ min}