9 JEE Main 2019 Nuclear Physics previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2019 previous-year questions from the Nuclear Physics chapter of Physics. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Nuclear Physics chapter hub.
Half lives of two radioactive nuclei A and B are 10 minutes and 20 minutes, respectively. If, initially a sample has eq…
In a radioactive decay chain, the initial nucleus is   90 232 Th . At the end, there are 6 α -particles and 4…
Consider the nuclear fission, Ne 20 → 2 He 4 + C 12 . Given that the binding energy/nucleon of Ne 20 ,   He…
At a given instant, say t = 0 , two radioactive substance A and B have equal activities. The ratio R B R A of their act…
A Sample of radioactive material A , that has an activity of 10   m   Ci   1   C i = 3.7 × 10…
Using a nuclear counter the count rate of emitted particles from a radioactive source is measured. At t = 0 it was 1600…
Two radioactive substances A and B have decay constants 5 λ and λ respectively. At t = 0 , a sample has the same number…
Two radioactive materials A and B have decay constants 10 λ and   λ , respectively. If initially they ha…
The ratio of mass densities of nuclei of   40 C a and   16 O is close to: