CUET · PHYSICS · PYQ PAPER 2023
When an electron of hydrogen atom is raised from the ground state to an excited state.
- A Both kinetic energy and potential energy decreases.
- B Both kinetic energy and potential energy increases.
- C The potential energy decreases and kinetic energy increases.
- D The potential energy increases and kinetic energy decreases.
Answer & Solution
Correct Answer
(D) The potential energy increases and kinetic energy decreases.
Step-by-step Solution
Detailed explanation
For hydrogen atom: \(KE = -E\), \(PE = 2E\). \(E_n \propto -\frac{1}{n^2}\). When electron is raised to excited state, \(n\) increases. As \(n\) increases, \(E_n\) increases (becomes less negative). Since \(KE = -E\), kinetic energy decreases. Since \(PE = 2E\), potential energy…
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