Verified Solution • 2025–26 Session moderate

QPage 383: Q11: HC Verma: Concepts of Physics - Volume 2 Bohr's Model and Physics of the Atom Page 383: Q11 Solution: A hydrogen atom in ground state absorbs 10.2 eV of energy. The…

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often try to compute the angular‑momentum change from the absorbed energy instead of using the Bohr rule $L=n\hbar$. The correct increase is simply $\Delta L=(2-1)\hbar=\hbar\approx1.05\times10^{-34}\,$J·s; any energy‑to‑momentum conversion leads to a wrong answer.

A hydrogen atom in ground state absorbs 10.2 eV of energy. The orbital angular momentum of the electron is increased by

Multiple Choice Options

  • A 1.05×10−34 J s1.05 \times 10^{-34} \text{ J s}
  • B 2.11×10−34 J s2.11 \times 10^{-34} \text{ J s}
  • C 3.16×10−34 J s3.16 \times 10^{-34} \text{ J s}
  • D 4.22×10−34 J s4.22 \times 10^{-34} \text{ J s}

Step-by-Step Verified Solution

**Answer:** (a) 1.05 _ 10___ J s. **Step-by-Step Explanation:** The electron is excited from n=1 to n=2. The angular momentum changes from _ to 2_, an increase of _ = 1.05 _ 10___ J s.

All Questions in this Chapter

QPage 383: Q1 QPage 383: Q2 QPage 383: Q3 QPage 383: Q4 QPage 383: Q5 QPage 383: Q6 QPage 383: Q7 QPage 383: Q8 QPage 383: Q9 QPage 383: Q10 QPage 383: Q11 QPage 383: Q12 QPage 383: Q13 QPages 382-383: Q1 QPages 382-383: Q2 QPages 382-383: Q3 QPages 382-383: Q4 QPages 382-383: Q5 QPages 382-383: Q6 QPages 382-383: Q7 QPages 382-383: Q8 QPages 382-383: Q9 QPages 382-383: Q10 QPages 383-384: Q1 QPages 383-384: Q2 QPages 383-384: Q3 QPages 383-384: Q4 QPages 383-384: Q5 QPages 383-384: Q6 QPages 384-386: Q1 QPages 384-386: Q2 QPages 384-386: Q3 QPages 384-386: Q4 QPages 384-386: Q5 QPages 384-386: Q6 QPages 384-386: Q7 QPages 384-386: Q8 QPages 384-386: Q9 QPages 384-386: Q10 QPages 384-386: Q11 QPages 384-386: Q12 QPages 384-386: Q13 QPages 384-386: Q14 QPages 384-386: Q15 QPages 384-386: Q16 QPages 384-386: Q17 QPages 384-386: Q18 QPages 384-386: Q19 QPages 384-386: Q20 QPages 384-386: Q21 QPages 384-386: Q22 QPages 384-386: Q23 QPages 384-386: Q24 QPages 384-386: Q25 QPages 384-386: Q26 QPages 384-386: Q27 QPages 384-386: Q28 QPages 384-386: Q29 QPages 384-386: Q30 QPages 384-386: Q31 QPages 384-386: Q32 QPages 384-386: Q33 QPages 384-386: Q34 QPages 384-386: Q35 QPages 384-386: Q36 QPages 384-386: Q37 QPages 384-386: Q38 QPages 384-386: Q39 QPages 384-386: Q40 QPages 384-386: Q41 QPages 384-386: Q42 QPages 384-386: Q43 QPages 384-386: Q44 QPages 384-386: Q45 QPages 384-386: Q46

Related Learning Resources & Exam Preparation

Chapter Practice Bank
Practice all topic-wise questions from Bohr's Model and Physics of the Atom
Reference Textbook Solutions
Explore complete chapter exercises for HC Verma: Concepts of Physics - Volume 2
Competitive PYQ Question Bank
Browse year-wise authentic previous years' questions with solutions
Authentic CBT Mock Tests
Simulate official exam environment with live timer and percentile scoring