(a) Deduce the expression, N=N_0 e^{-\lambda t}, for the law of radioactive decay. (b) (i) Write symbolically the process expressing the \beta+ decay of { }_{11}^{22} {\Na}. Also write the basic nuclear process underlying this decay. (ii) If the nucleus formed in the decay of the nucleus { }

CBSE Class 12 Physics 2014 Delhi Set 1 Paper

Question : 27

Total: 30

(a) Deduce the expression, N=N0e−λt, for the law of radioactive decay.
(b) (i) Write symbolically the process expressing the β+ decay of ‌1122‌Na. Also write the basic nuclear process underlying this decay.
(ii) If the nucleus formed in the decay of the nucleus ‌1122‌Na, and isotope or isobar?

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