Two radioactive substances A and B have decay constants 5λ and λ respectively. At t = 0…
Physics · Class 12 · CBSE — Nuclei
Two radioactive substances A and B have decay constants 5λ and λ respectively. At t = 0, they have the same number of nuclei.
The ratio of number of nuclei of A to those of B will be (1/e)2 after a time interval
The ratio of number of nuclei of A to those of B will be (1/e)2 after a time interval
- 4l
- 2l
- 1/2l
- 1/4l
Answer
(C) 1/2 l
Sign up free on Edukali to view the step-by-step worked solution and practice thousands of similar questions.
Related practice questions
- Two samples X and Y contain equal amount of radioactive substances. If of the sample X and of the sample Y …
- The mass of 3 7 Li is 0.042 amu less than the sum of masses of its constituents. The binding energy per…
- The count rate of a radioactive sample falls from 4.0 × 10 6 s –1 to 1.0 × 10 6 s –1 in 20 hours. What will…
- If the binding energy per nucleon of deuterium is 1.115 MeV, its mass defect in atomic mass unit is
- A fraction f 1 of a radioactive sample decays in one mean life, and a fraction f 2 decays in one half life…
- Consider α and β particles and γ-rays each having an energy of 0.5 MeV. In the increasing order of…
- The decay constant of a radio active isotope is λ. If A 1 and A 2 are its activities at times t 1 and t 2…
- If the nucleus _ 13 ^ 27 Al has a nuclear radius of about 3.6 fm, then _ 32 ^ 125 Te would have its radius…