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
    After five half lives what will be the fraction of initial substance                                 [RPMT 2000]

    A)            \[{{\left( \frac{1}{2} \right)}^{10}}\]                              

    B)            \[{{\left( \frac{1}{2} \right)}^{5}}\]

    C)            \[{{\left( \frac{1}{2} \right)}^{4}}\]                                 

    D)            \[{{\left( \frac{1}{2} \right)}^{3}}\]

    Correct Answer: B

    Solution :

               \[\frac{N}{{{N}_{0}}}={{\left( \frac{1}{2} \right)}^{n}}={{\left( \frac{1}{2} \right)}^{5}}\]


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