STANDARDPhysics-Atomic Structure
STANDARD Physics Bohr's Model MCQ Question
Type: MCQ-conceptual-Medium-Class 11
If speed of electron in ground state energy level is 2.2 × 10⁶ m s⁻¹, then its speed in third excited state will be
A
6.8 × 10⁶ m s⁻¹
B
8.8 × 10⁵ m s⁻¹
C
5.5 × 10⁵ m s⁻¹
D
5.5 × 10⁶ m s⁻¹
Correct Answer
Option C
Detailed Explanation
According to Bohr's model, v ∝ 1/n. Here, vₐ = 2.2 × 10⁶ m s⁻¹; nₐ = 1, n₈ = 4. Thus, v₈ = vₐ × (1/4) = 0.55 × 10⁶ = 5.5 × 10⁵ m s⁻¹.
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