NEET Physics Nuclei Questions Solved


N atoms of a radioactive element emit n alpha particles per second. The half life of the element is

(a) nN sec                    (b) Nn sec
(c) 0.693 Nn sec           (d)  0.693 nN sec

(c) dNdt=-λNn=-λN (GIven dNdt=n )

λ=-nN    Half life = 0.693λ=0.693 Nn sec

Difficulty Level:

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