JEE Main 2022 Physics question
Following statements related to radioactivity are given below: (a) Radioactivity is a random and spontaneous process and is dependent on physical and chemical conditions. (b) The number of un-decayed nuclei in the radioactive sample decays exponentially with time. (c) Slope of the graph of (no. of undecayed nuclei) Vs. time represents the reciprocal of mean life time . (d) Product of decay constant and half-life time is not constant. Choose the most appropriate answer from the options given below:
Answer: (3)
Solution
(a) is false: radioactivity is random and spontaneous but independent of physical and chemical conditions. (b) is true: . (c) is true: ln +
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