JEE Main202624 January 2026Morning ShiftPhysicsAtomic PhysicsActual
Two electrons are moving in orbits of two hydrogen like atoms with speeds 3 10⁵ ~m / s and 2.5 10⁵ ~m / s respectively. If the radii of these orbits are nearly same then the possible order of energy states are _ _ _ _ respectively.
Options
- A8 and 10
- B9 and 8
- C10 and 12
- D6 and 5
Correct answer
D. 6 and 5
Step-by-step solution
For hydrogen-like atoms: V Z n and r n^2 Z Thus r n V Since the radii are nearly the same: n₁ V₁ = n₂ V₂ n₁ n₂ = V₁ V₂ = 3 10^5 2.5 10^5 = 6 5 Possible order of energy states is 6 and 5.