Gujarat Technological UniversityWinter 2023 examination

GTU 3110018 Physics Winter 2023 Question Paper & PDF

B.E. · Common Engineering · Semester 1 · Subject code 3110018
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Total
70 marks
To pass
23 marks (33%)
Duration
2.5 Hours 2:30 PM – 5:00 PM
Questions
5 with internal choice
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15 of 25 questions on this paper were also asked in other years. 3 more are types 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 6 of 7 papers

Mention any three postulates of classical free electron theory proposed by Lorents and Drude.

Also asked in Summer 2026 Q1a, Summer 2025 Q2a, Winter 2024 Q5a OR, Summer 2024 Q3a OR, Summer 2023 Q2a

(b)
4 marks
iState any two points of differences between intrinsic and extrinsic semiconductors.
iiState any two points of differences between n-type and p-type semiconductors.
(c)
7 marksAsked in 5 of 7 papers

What is superconductivity? Discuss any three properties of superconductors in detail.

Also asked in Summer 2026 Q1c, Winter 2025 Q5c OR, Summer 2025 Q5b OR, Summer 2024 Q4c

Q.2

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

Obtain Fermi factor f (E) for energy 0.01 eV above Fermi energy (Ef) at 500 K.

Also asked in Summer 2025 Q3a

(b)
4 marksAsked in 2 of 7 papers
State and discuss Wiedemann-Franz law.

Also asked in Summer 2025 Q1a

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

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

(c)
7 marksAsked in 2 of 7 papers

What is E-k diagram? Discuss direct and indirect band gap semiconductors based on E-k diagram.

Also asked in Summer 2026 Q3c

Q.3

14 Marks
(a)
3 marks
iWrite fermi distribution function and mention physical significance of it.
iiMention any two applications of solar cell.
(b)
4 marks
Derive formula of drift and diffusion current densities.
(c)
7 marksAsked in 2 of 7 papers
iDraw characteristic curve for p-n junction diode.
iiDiscuss forward bias characteristics with proper circuit diagram.
iiiDiscuss reverse bias characteristics with proper circuit diagram.

Also asked in Summer 2025 Q3c

(a)
3 marks

A potential barrier of 0.6 V exists across of p-n junction. The intensity of the electric field in this region is 2.4 10⁶ V/m. Find the width of depletion region.

(b)
4 marks
iMention any two applications of LED.
iiCalculate the value of band gap for a LED for the emission of blue light of wavelength 452 nm. (h = 6.63 10‒34 J s, c = 3 10⁸ m/s)
(c)
7 marksAsked in 2 of 7 papers
Derive formula of fermi energy level for n-type semiconductor.

Also asked in Summer 2025 Q3c OR

Q.4

14 Marks
(a)
3 marksAsked in 2 of 7 papers
iWhat is called optoelectronic device?
iiName the types of metal-semiconductor junction.
iiiWhat is called exciton?

Also asked in Summer 2025 Q4a OR

(b)
4 marksAsked in 4 of 7 papers
Discuss Frenkel and Wannier-Mott exciton in brief.

Also asked in Winter 2024 Q3b, Summer 2024 Q5b, Summer 2023 Q3b OR

(c)
7 marksAsked in 5 of 7 papers

What is photovoltaic effect? Explain construction and working of solar cell in detail.

Also asked in Summer 2026 Q4c, Winter 2025 Q3b, Summer 2025 Q1c, Summer 2023 Q3c

(a)
3 marksSame type asked in 3 of 7 papers
iWhat is Hall effect?
iiThe Hall coefficient of a semiconducting material is 2.4 10‒4 m³/C. Calculate the mobility and carrier concentration of the carrier if resistivity is 6 10‒3 Ω m.

Also asked in Summer 2026 Q4b OR, Winter 2025 Q4a

(b)
4 marksAsked in 5 of 7 papers
Discuss Fermi’s golden rule for transition probability.

Also asked in Winter 2025 Q5a OR, Summer 2025 Q3b OR, Summer 2024 Q5b OR, Summer 2023 Q5a OR

(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, Summer 2025 Q4c OR

Q.5

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

Calculate the critical current through a long thin superconducting wire of radius 10–3 m. The critical magnetic field is 6.2 10³ A/m.

Also asked in Summer 2026 Q4b, Summer 2023 Q5b OR

(b)
4 marksAsked in 4 of 7 papers

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

Also asked in Summer 2025 Q4a, Winter 2024 Q3a, Summer 2023 Q1b

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

Also asked in Summer 2026 Q2c OR, Summer 2025 Q4c

(a)
3 marks

The critical temperature of a superconductor is 7.5 K. Calculate the critical field at 5 K. At 0 K the critical field is 0.24 T.

(b)
4 marks
Write a short note on London penetration depth.
(c)
7 marksAsked in 2 of 7 papers
iDiscuss BCS theory of superconductivity in brief.
iiDraw constructive diagram of SQUID and mention its application.

Also asked in Summer 2026 Q5c OR

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
Summer 202570 marks · 5 questions
Winter 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 (Winter 2023, 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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