LU B.Sc Sem 5 Physics Solid State Physics Important Questions 2026 | PYQ Pattern
LU B.Sc 5th Semester Physics (Solid State Physics) Important Questions 2026 – Lucknow University (LU) aur affiliated colleges ke B.Sc NEP Semester V (PCM group) students ke liye Physics – Solid State Physics (Paper-I) ke sabse important questions, bilkul previous year question paper (PYQ) pattern me. Saare questions neeche page par hi hain – section-wise.
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Paper Details – B.Sc Sem 5 Physics (LU NEP 2026)
| University | University of Lucknow (LU) + affiliated colleges |
| Course | B.Sc. V Semester (NEP) – PCM |
| Paper | Physics – Solid State Physics (Paper-I) |
| Time / Marks | 2 Hours / 75 Marks |
| Pattern | Kul 4 questions: Section A se 1 (15 marks) + Section B se 3 (20 marks each) |
Section A – Important Questions (15 Marks)
Note: Section A se koi ek question attempt karna hai.
Q1. (a) Define a symmetry operation and prove that five-fold rotational symmetry cannot exist in a lattice.
(b) Describe the NaCl crystal structure and find the number of formula units per unit cell. [15 Marks]
Q2. (a) Explain Bragg’s law and how X-ray diffraction is used to find crystal structure.
(b) X-rays of wavelength 1.54 Å strike atomic planes at 30°. Find the interplanar spacing d. [15 Marks]
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Section B – Important Questions (20 Marks)
Note: Section B se koi teen questions attempt karne hain.
Q3. What is a reciprocal lattice? Prove that the reciprocal of the fcc lattice is bcc, and that the volume of the reciprocal lattice cell varies inversely as that of the direct lattice cell. [20 Marks]
Q4. (a) Define Miller indices and sketch the planes (110), (111) and (120).
(b) Explain Brillouin zones and draw the first Brillouin zone of a two-dimensional square lattice. [20 Marks]
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Q5. Obtain the dispersion relation for a diatomic linear lattice and explain how it differs from that of a monoatomic lattice. [20 Marks]
Q6. Discuss the Kronig-Penney model for an electron in a periodic potential, obtain the E vs K relation and explain how energy bands arise. [20 Marks]
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Q7. (a) Explain Einstein’s model of specific heat of solids, its success and failure.
(b) Explain Debye’s model and show that specific heat varies as T³ at low temperature. [20 Marks]
Q8. Define polarization and polarizability. Name the types of polarization and obtain the relation between dielectric constant and electric susceptibility. [20 Marks]
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Q9. Explain the origin of dia-, para-, ferro-, antiferro- and ferri-magnetism. Present Langevin’s theory of paramagnetism and explain the Curie-Weiss law. [20 Marks]
Q10. Write short notes on: (a) Schottky and Frenkel defects (b) Packing fraction (c) Madelung constant (d) Hall effect [20 Marks]
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Exam Tips – Physics (Solid State Physics)
- Section A ke long answers ke short notes bana lo – 15 marks pakke karo.
- Section B ke derivations / numericals / diagrams ki practice karo.
- Upar ke questions ko 2 ghante me PYQ ki tarah solve karke dekho.
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FAQs
LU B.Sc 5th Semester Physics (Solid State Physics) exam me kitne questions attempt karne hote hain?
Ye 75 marks ka 2 ghante ka paper hai. Kul 4 questions attempt karne hote hain – Section A se 1 question (15 marks) aur Section B se 3 questions (20-20 marks).
Kya ye LU B.Sc Sem 5 Physics ka official previous year question paper (PYQ) hai?
Nahi. Ye LUUPDATE team ka banaya 2026 exam ke liye most important questions ka set hai, jo Lucknow University ke previous year papers ke pattern aur NEP syllabus par based hai.
B.Sc Sem 5 Physics Solid State Physics ke answers / solutions kahan milenge?
LUUPDATE ke Most Important Questions course (BA, B.Sc, B.Com Sem I, III & V) me har question ka pura solution milta hai – sirf ₹99 me, LUUPDATE App par.
Ye paper kis group ke liye hai – PCM ya ZBC?
Physics (Solid State Physics) LU B.Sc NEP Semester V ke PCM group ke students ke liye hai.
Disclaimer: Ye LUUPDATE team dwara taiyar kiye gaye expected important questions hain (previous year pattern par), Lucknow University ka official question paper nahi. Exam pattern aur syllabus ke liye university ka official notice zaroor dekhein.
