CMC Medical CMC-Medical VELLORE Solved Paper-2014

  • question_answer
    The electron emitted in beta radiation originates from

    A)  inner orbits of atom

    B)  free electron existing in nuclei

    C)  decay of neutron in the nucleus

    D)  photon escaping from the nucleus

    Correct Answer: C

    Solution :

                    In beta decay, a beta minus particle \[({{\beta }^{-}})\]is an electron emission of \[\beta \] involves, transfor-mation of a neutron into a proton an electron and a third particle called an anti-neutrin\[(\bar{v}).\] \[_{0}{{n}^{1}}={{\,}_{1}}{{p}^{1}}+{{\,}_{-1}}\,{{\beta }^{0}}+\bar{v}\]


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