Gujarat Technological UniversitySummer 2025 examination

GTU 3110018 Physics Summer 2025 Question Paper & PDF

B.E. · Common Engineering · Semesters 1 and 2 · Subject code 3110018
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Total
70 marks
To pass
23 marks (33%)
Duration
2.5 Hours 10:30 AM – 1:00 PM
Questions
5 with internal choice
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19 of 25 questions on this paper were also asked in other years. 1 more is a type of question GTU sets again with new data. Each is marked below with the years it appeared.See all 40 repeated 3110018 questions, most asked first

Q.1

14 Marks
(a)
3 marksAsked in 2 of 7 papers
State and discuss Wiedemann-Franz law.

Also asked in Winter 2023 Q2b

(b)
4 marksAsked in 4 of 7 papers

What is called Energy Band Gap? Draw energy band diagram for (i) Conductors, (ii) Semiconductors and (iii) Insulators.

Also asked in Winter 2025 Q1b, Summer 2024 Q4b OR, Summer 2023 Q1c

(c)
7 marksAsked in 5 of 7 papers

What is photovoltaic effect? With neat diagram discuss construction and working of solar cell.

Also asked in Summer 2026 Q4c, Winter 2025 Q3b, Winter 2023 Q4c, Summer 2023 Q3c

Q.2

14 Marks
(a)
3 marksAsked in 6 of 7 papers
Enlist the assumptions of classical free electron theory. (Any three)

Also asked in Summer 2026 Q1a, Winter 2024 Q5a OR, Summer 2024 Q3a OR, Winter 2023 Q1a, Summer 2023 Q2a

(b)
4 marksAsked in 3 of 7 papers

State any four points of differences between N-type and P-type Semiconductors.

Also asked in Winter 2024 Q3a OR, Summer 2024 Q2a

(c)
7 marksAsked in 6 of 7 papers
Discuss in detail Kronig – Penney Model.

Also asked in Summer 2026 Q3c OR, Winter 2025 Q1c, Winter 2024 Q1c, Summer 2024 Q1c, Summer 2023 Q3c OR

(c)
7 marksAsked in 5 of 7 papers
Define density of states and derive its expression.

Also asked in Winter 2025 Q4c, Winter 2024 Q4c, Winter 2023 Q2c, Summer 2023 Q2c OR

Q.3

14 Marks
(a)
3 marksSame type asked in 2 of 7 papers

Evaluate Fermi function (or occupation probability) for energy 2kBT above the Fermi energy.

Also asked in Winter 2023 Q2a

(b)
4 marks
Derive formula of diffusion current density for electron as well as hole.
(c)
7 marksAsked in 2 of 7 papers

Discuss forward bias and reverse bias for a PN junction diode and draw characteristics curve.

Also asked in Winter 2023 Q3c

(a)
3 marks
Write short note on: Phonon.
(b)
4 marksAsked in 5 of 7 papers
Discuss Fermi golden rule for transition probability.

Also asked in Winter 2025 Q5a OR, Summer 2024 Q5b OR, Winter 2023 Q4b OR, Summer 2023 Q5a OR

(c)
7 marksAsked in 2 of 7 papers
Derive formula of fermi energy level for N-type semiconductor.

Also asked in Winter 2023 Q3c OR

Q.4

14 Marks
(a)
3 marksAsked in 4 of 7 papers

State any three points of differences between spontaneous emission and stimulated emission.

Also asked in Winter 2024 Q3a, Winter 2023 Q5b, Summer 2023 Q1b

(b)
4 marksAsked in 4 of 7 papers
Discuss direct and indirect band gap semiconductors.

Also asked in Winter 2024 Q1b, Summer 2024 Q5a, Summer 2023 Q2b

(c)
7 marksAsked in 3 of 7 papers
Explain in detail experimental procedure for DLTS.

Also asked in Summer 2026 Q2c OR, Winter 2023 Q5c

(a)
3 marksAsked in 2 of 7 papers
iWhat is called exciton?
iiName two metal-semiconductor junctions.
iiiWhat is called optoelectronic device?

Also asked in Winter 2023 Q4a

(b)
4 marks

The electrical conductivity (σ) of copper at 300 K is 6.2 × 107 Ω–1 m–1. Calculate the thermal conductivity of copper. Lorentz number is 2.44 × 10– 8 W/K².

(c)
7 marksAsked in 3 of 7 papers

Discuss in detail UV-VIS method for band gap measurement of semiconductor.

Also asked in Winter 2025 Q4c OR, Winter 2023 Q4c OR

Q.5

14 Marks
(a)
3 marksAsked in 4 of 7 papers
What is Meissner effect? For superconductor show that χm = –1.

Also asked in Summer 2026 Q5c, Winter 2024 Q5b OR, Summer 2023 Q4c

(b)
4 marksAsked in 5 of 7 papers
Write any four points of comparison of type-I and type-II superconductor.

Also asked in Winter 2025 Q5a, Winter 2024 Q5a, Summer 2024 Q2b, Summer 2023 Q5b

(c)
7 marks
iCalculate the critical current for a superconducting wire having radius of 0.2 mm at 5 K. Critical temperature of material of wire is 7.2 K and Hc
0is 2.2 × 10⁴ A/m.
iiFor a superconducting material isotopic mass is 195 amu and critical temperature is 5.2 K. Calculate isotopic mass at 6.5 K.
(a)
3 marks
Write a short note on: SQUID
(b)
4 marksAsked in 5 of 7 papers
What is superconductivity? Discuss any three properties of superconductor.

Also asked in Summer 2026 Q1c, Winter 2025 Q5c OR, Summer 2024 Q4c, Winter 2023 Q1c

(c)
7 marksAsked in 4 of 7 papers
Discuss in detail four-point probe method for the measurement of resistivity.

Also asked in Summer 2026 Q2c, Winter 2024 Q4c OR, Summer 2023 Q5c

More Physics papers

Questions repeat across sessions. Working through two or three papers shows you which topics GTU asks most.

Summer 202670 marks · 5 questions
Winter 202570 marks · 5 questions
Winter 202470 marks · 5 questions
Summer 202470 marks · 5 questions

Other Semester 1 subjects

BE Common

3110001
Chemistry
3110002
English
3110003
Programming for Problem Solving
3110004
Basic Civil Engineering

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About this paper

Official Gujarat Technological University (GTU) examination paper for Physics (Summer 2025, B.E. · Common Engineering, Sem 1). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.

Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.

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