2. Questions Bank
  3. JEE Main & Advanced
  4. Physics
  5. Nuclear Physics And Radioactivity

JEE Main & Advanced Physics Nuclear Physics And Radioactivity Question Bank Radioactivity

  • question_answer
    Three fourth of the active decays in a radioactive sample in 3/4 sec. The half life of the sample is [KCET (Engg.) 2001]

    A)            \[\frac{1}{2}\] sec              

    B)            1 sec

    C)            \[\frac{3}{8}\] sec              

    D)            \[\frac{3}{4}\] sec

    Correct Answer: C

    Solution :

                       \[\frac{3}{4}th\] active decay takes place in time \[t=2\,({{T}_{1/2}})\] Þ \[\frac{3}{4}=2\,({{T}_{1/2}})\] Þ \[{{T}_{1/2}}=\frac{3}{8}\sec \]


You need to login to perform this action.
You will be redirected in 3 sec spinner