NEET Physics Nuclei Questions Solved


A radioactive material has a half-life of 8 years. The activity of the material will decrease to about 1/8 of its original value in 
(a) 256 year            (b) 128 year
(c) 64 year              (d) 24 year

(d) AA0=12t/T1/218=12t/8t=24 years

Difficulty Level:

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