Gujarat Technological UniversitySummer 2024 examination

GTU 3110018 Physics Summer 2024 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 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. 2 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 marks

Define following terms.

iCritical Temperature
iiPersistent Current
iiiIsotope effect
(b)
4 marksAsked in 5 of 7 papers
Explain hot point probe method with necessary diagrams.

Also asked in Summer 2026 Q4a, Winter 2025 Q4a OR, Winter 2024 Q4b OR, Summer 2023 Q4b OR

(c)
7 marksAsked in 6 of 7 papers

Explain in detail how Kronig and Penney model explains the origin of band gap in semiconductors.

Also asked in Summer 2026 Q3c OR, Winter 2025 Q1c, Summer 2025 Q2c, Winter 2024 Q1c, Summer 2023 Q3c OR

Q.2

14 Marks
(a)
3 marksAsked in 3 of 7 papers
Compare n-Type and p-Type Semiconductors.

Also asked in Summer 2025 Q2b, Winter 2024 Q3a OR

(b)
4 marksAsked in 5 of 7 papers
Distinguish between Type-I and Type-II Superconductivity.

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

(c)
7 marksAsked in 3 of 7 papers

Determine the necessary formula for density of hole in Valence Band for Intrinsic Semiconductors.

Also asked in Winter 2025 Q2c, Winter 2024 Q2c

(c)
7 marksAsked in 2 of 7 papers

What are Einstein’s coefficients? Give relation between them and discuss the result.

Also asked in Winter 2024 Q3c OR

Q.3

14 Marks
(a)
3 marksAsked in 2 of 7 papers
Define:
iEnergy Gap
iiFermi Function
iiiDensity of states

Also asked in Summer 2026 Q3a

(b)
4 marksSame type asked in 2 of 7 papers

Estimate the position of Fermi Level at 300 K for a material with EC = 0.8 eV and EV = 0.5 eV (me* = 0.14m0 and mh* = 0.28m0 , m0 is rest mass of an electron).

Also asked in Summer 2026 Q1b

(c)
7 marks
Illustrate Four probe method for thin sheet and bulk sample in detail.
(a)
3 marksAsked in 6 of 7 papers
What are the postulates for free electron theory?

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

(b)
4 marks

In an intrinsic semiconductor, energy gap is 1.3 eV. Evaluate the ratio between its conductivity at temperature 700 K and 400 K.

(c)
7 marks

Show that Junction capacitance is inversely proportional to square root of Reverse biasing Voltage.

Q.4

14 Marks
(a)
3 marks

What do you mean by Photo Voltaic Effect? Write its three applications in the field of engineering.

(b)
4 marksSame type asked in 2 of 7 papers

Using Fermi function, evaluate the temperature at which there is 20 % probability that an electron in solid will have energy 0.3 eV above EF of 3 eV.

Also asked in Summer 2026 Q3b OR

(c)
7 marksAsked in 5 of 7 papers

Explain at least seven properties of Superconductors in detail with necessary diagram and equations.

Also asked in Summer 2026 Q1c, Winter 2025 Q5c OR, Summer 2025 Q5b OR, Winter 2023 Q1c

(a)
3 marksAsked in 2 of 7 papers
Define :
iPopulation Inversion
iiMeta stable state
iiiActive Medium

Also asked in Winter 2025 Q2a

(b)
4 marksAsked in 4 of 7 papers

Explain how the materials are classified into conductors, semiconductors and insulators with the help of energy band diagrams.

Also asked in Winter 2025 Q1b, Summer 2025 Q1b, Summer 2023 Q1c

(c)
7 marks

Briefly outline the mechanism of superconductivity using BCS theory and explain penetration depth.

Q.5

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

Compare Direct Band Gap semiconductors and Indirect Band Gap semiconductors

Also asked in Summer 2025 Q4b, Winter 2024 Q1b, Summer 2023 Q2b

(b)
4 marksAsked in 4 of 7 papers
What are Excitons? explain the types of Exciton.

Also asked in Winter 2024 Q3b, Winter 2023 Q4b, Summer 2023 Q3b OR

(c)
7 marks
iEstimate the concentration of holes and electrons in n-type silicon at 300 K. If the conductivity is 8 X 10⁴ Ʊ/m. also find these value for p- type Si. ni = 2.5 X 10¹⁶ m-3 ,electron and hole mobility is 1600X10⁻⁴ m²/V.Sec and 700X10⁻⁴ m²/V.Sec respectively.
iiEvaluate the Electron and Hole concentration at room temperature, for a intrinsic semiconductor, if its conductivity at room temperature is 8×10- 4 Ʊ/m. The mobility of Electron and Hole are 0.24 m²/V.Sec and 0.08 m²/V.Sec respectively.
(a)
3 marksAsked in 2 of 7 papers
List difference between drift and diffusion current

Also asked in Summer 2023 Q5a

(b)
4 marksAsked in 5 of 7 papers
Explain in detail the Fermi’s Golden Rule.

Also asked in Winter 2025 Q5a OR, Summer 2025 Q3b OR, Winter 2023 Q4b OR, Summer 2023 Q5a OR

(c)
3 marks
iIn a solid consider an energy level lying 0.2 eV above Fermi level. Estimate the probability of this level not being occupied by an electron at room temperature.
iiA rectangular semiconductor specimen of thickness 1 mm is placed in the magnetic field of flux density 0.5 Wb/m². Current of 1.5 mA is flowing through the specimen in one direction. Evaluate Hall coefficient of the material if generated hall voltage is 7.5 mV.

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

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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 2024, 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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