MHT CET202123 Sep 2021Morning ShiftPhysicsAtomic PhysicsActual
An electron makes a transition from an excited state to the ground state of a hydrogen like atom. Out of the following statements which one is correct?
Options
- AKinetic energy potential energy and total energy decrease
- BKinetic energy and total energy decreased but potential energy increases
- CKinetic energy increases but potential energy and total energy decreases
- DKinetic energy decreases, potential energy increases but total energy remains the same.
Correct answer
C. Kinetic energy increases but potential energy and total energy decreases
Step-by-step solution
aligned & Potential energy =- 1 4 ₀ ze ^2 r & Kinetic energy =- 1 2 ( P.E. )= 1 8 ₀ ze ^2 r & Total energy . 1 2 (P.E. )=- 1 8 ₀ ze ^2 r aligned As r decreases K.E, increases but P.E. and T.E. decreases (since they are negative).