NEET Physics Nuclei Questions Solved


A radioactive material has a half life of 10 days. What fraction of the material would remain after 30 days

(a) 0.5               (b) 0.25
(c) 0.125            (d) 0.33

(c) N=N012tT1/2NN0=123010=18=0.125

Difficulty Level:

  • 15%
  • 29%
  • 58%
  • 0%