Physics Atomic and Nuclear Physics JEE (Main) / AIEEE Problems (Previous Years - Atomic) MCQ (Single Correct)

As an electron makes a transition from an excited state to the ground state of a hydrogen - like atom/ion:

A
its kinetic energy increases but potential energy and total energy decrease
B
kinetic energy, potential energy and total energy decrease
C
kinetic energy decreases, potential energy increases but total energy remains same
D
kinetic energy and total energy decrease but potential energy increases

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Verified by Experts
The correct answer is:
A

As we know that kinetic energy of an electron is

When the electron makes transition from an excited state to the ground state, then decreases and KE increases. We know that PE is lowest for ground state. As TE = - KE. TE also decreases,

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