नाभिक कक्षा 12 अध्याय 13 | रेडियोएक्टिव क्षय नियम | Nuclei Chapter in Hindi | Radioactive Decay Law

Class 12 Physics | Chapter 13 Nuclei | Important Questions and Quick Revision

Which of the following is correct regarding radioactive process ? (i) Despite the strength of the forces that hold them togther, many nucleides are unstable and spontaneously alter temselves through radioactive decay sometime through radioactive decay somtimes through a series of such decays, untiall thry reach stable comfigurations (ii) When a nucleus undergoes alpha or beta decay, its atomic number Z chnges and it becomes the nucleus of a different element The energy liberated during radioactive decay comes form within individual nuclei without external exciatation, unlike the case of atomic radiation (iv) Radioactive decay is a statistical process that obeys the laws of chance. no cause effect relationship is involved in the decay of a particular nucleus, only a certain probaility per unit time

State the law of radioactive decay. Plot a graph showing the number (N) of undecayed nuclei as a function of time (t) for a given radioactive sample having half life T_(1//2) Depict in the plot the number of undecayed nuclei at (i) t=3T_(1//2) and (ii) t=5T_(1//2) .

A radioactive substance has a half-life of 64.8 h. A sample containing this isotope has an initial activity (t=0) of 40muCi . Calculate the number of nuclei that decay in the time interval between t_1=10.0h and t_2=12.0h .