Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Atoms

Question:

When a hydrogen atom is raised from the ground state to an excited state.

Options:

P.E. increases and K.E. decreases

P.E. decreases and K.E. increases

Both kinetic energy and potential energy increase

Both K.E. and P.E. decrease

Correct Answer:

P.E. increases and K.E. decreases

Explanation:

P.E. $\propto-\frac{1}{r}$ and K.E. $\propto \frac{1}{r}$

As r increases so K.E. decreases but P.E. increases.