Law of Radioactive Decay, Half-Life and Mean Life

JEE Main Physics · Atoms and Nuclei · 9 questions, latest first

• A radioactive nucleus n_2 has 3 times the decay constant as compared to the decay constant of another radioactive nucleus n_1. If…202523 January, Shift 1 · Q44
• The half-life of a radioactive nucleus is 5 years. The fraction of the original sample that would decay in 15 years is:202315 April, Shift 1 · Q44
• Two radioactive elements A and B initially have same number of atoms. The half life of A is same as the average life of B. If λ_A…202311 April, Shift 1 · Q33
• The half life of a radioactive substance is T. The time taken, for disintegrating 7/8 th part of its original mass will be:202310 April, Shift 2 · Q44
• The decay constant for a radioactive nuclide is 1.5 × 10^-5 s^-1. Atomic weight of the substance is 60 g mole ^-1,(N_A=6 ×…202310 April, Shift 1 · Q56
• A radio active material is reduced to 1 / 8 of its original amount in 3 days. If 8 × 10^-3 kg of the material is left after 5…20238 April, Shift 2 · Q44
• A radioactive nucleus decays by two different process. The half life of the first process is 5 minutes and that of the second…202330 January, Shift 2 · Q29
• Substance A has atomic mass number 16 and half life of 1 day. Another substance B has atomic mass number 32 and half life of 1/2…202329 January, Shift 2 · Q18
• If a radioactive element having half-life of 30 min is undergoing beta decay, the fraction of radioactive element remains…202329 January, Shift 1 · Q19