Q57 / 75 · JEE Main 2025 (28 Jan Shift 1) · Physics

Choose the correct nuclear process from the below options [p: proton, n : neutron, $\mathrm{e}^{-}$: electron, $\mathrm{e}^{+}$: positron, $v:$ neutrino, $\bar{v}$ : antineutrino]

  • A
    $\mathrm{n} \rightarrow \mathrm{p}+\mathrm{e}^{+}+\bar{v}$
  • B
    $\mathrm{n} \rightarrow \mathrm{p}+\mathrm{e}^{+}+\boldsymbol{v}$
  • C
    $\mathrm{n} \rightarrow \mathrm{p}+\mathrm{e}^{-}+\boldsymbol{v}$
  • Correct answer
    D
    $\mathrm{n} \rightarrow \mathrm{p}+\mathrm{e}^{-}+\bar{v}$

Solution

For all nuclear processes, charge must be conserved. Also, when a release of an electron ( $e^{-}$) is always accompanied by a release of an antineutrino ( $\bar{v}$ ) Hence, $n \rightarrow p+\mathrm{e}^{-}+\overline{\mathrm{v}}$ is the correct answer.

Hence, the correct answer is option: 'D'.

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