When an electron of hydrogen atom is raised from the ground state to an excited state.
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → The potential energy increases and kinetic energy decreases
As the electron moves to a higher orbit (excited state), the distance 'r' increases. Hence, the magnitude of the potential energy decreases, and the potential energy become less negative.
When the electron moves to a higher energy level, the kinetic energy decreases because the electron's speed reduces in higher orbits.