At , the number of radioactive nuclei of a radioactive substance is and its activity…

PHYSICS · Multi correct · CBSE · Physics · Nuclei · Nuclei

Problem

t=0

, the number of radioactive nuclei of a radioactive substance is

x

and its activity is

y

. The half-life of the radioactive substance is

T

. Then, (1)

\frac{x}{y}

is constant throughout (2)

\frac{x}{y}>T

(3) The value of

xy

remains half after one half-life (4) The value of

xy

remains one fourth after one half-life