During a \\beta^{-} decay

Correct Answer is : A neutron in the nucleus decays emitting an electron.

A proton in the nucleus decays emitting an electron.

An atomic electron is electron is ejected.

An electron which is already present within the nucleus is ejected.

A neutron in the nucleus decays emitting an electron.

KCET 2020 Physics Solved Paper

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During a β− decay

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