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MDCAT Physics QUESTION #366
Question 1
Beta ray emitted by a radioactive substance is:
  • An electron which was existing outside the nucleus
  • An electron which was existing inside the nucleus
  • An electron emitted by the nucleus as a result of the decay of neutron inside the nucleus✔️
  • A pulse of electromagnetic wave
Correct Answer Explanation
Beta decay occurs when a neutron converts to a proton and emits an electron from the nucleus