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  4. The energy spectrum of β -particles [number N (E) as a function of β - energy E ] emitted from a radioactive source is

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Q. The energy spectrum of $\beta -particles \, $ [number $N \left(E\right)$ as a function of $\beta -$ energy $E$ ] emitted from a radioactive source is

NTA AbhyasNTA Abhyas 2022

Solution:

In $\beta $ - decay, energy emission is continuous and energy is shared between $\beta $ - particles and daughter nuclei.
Thus certain $\beta $ -particles have zero energy and certain have maximum energy.
Option (1) is most appropriate
Solution