Question 1
(a)
Define: Recombination and carrier generation
3 Marks
(b)
Differentiate: Spontaneous and Stimulated emission.
4 Marks
(c)
Explain Energy Band Diagrams in solids with the necessary diagram.
7 Marks
Gujarat Technological UniversitySummer 2023 Examination
GTU 3110018 Physics Summer 2023 Paper Solution & PDF
B.E. · Common Engineering · Semester 1 · Subject Code: 3110018
Total Marks70 MarksExternal theory exam
Passing Marks23 Marks33% minimum cutoff
Exam Duration2.5 Hours10:30 AM – 1:00 PM
Paper Structure5 QuestionsWith internal OR choices
Question 2
(a)
State assumption of classical free electron gas theory.
3 Marks
(b)
Differentiate: Direct and Indirect bandgap in semiconductors
4 Marks
(c)
Explain: Working of the p-n junction diode and state its applications.
7 Marks
OR OPTION
(c)
Write a short note on DOS ( Density of State)
7 Marks
Question 3
(a)
State: Fermi function
3 Marks
(b)
Differentiate: Intrinsic and Extrinsic Semiconductor.
4 Marks
(c)
Explain the working of solar cells with the necessary diagram.
7 Marks
OR OPTION
(a)
Define: Ohmic junction
3 Marks
(b)
Explain: Exciton
4 Marks
(c)
Write a brief note on Kronig-Penney Model.
7 Marks
Question 4
(a)
Define: Superconductivity and Transition temperature Tc
3 Marks
(b)
Write down applications associated with SQUID.
4 Marks
(c)
Explain the Meissner effect and prove that superconductors are perfect diamagnetic.
7 Marks
OR OPTION
(a)
Define: Absorption of Light
3 Marks
(b)
Explain: Hot Point probe measurements.
4 Marks
(c)
Write a brief note on the density of electrons in the conduction band.
7 Marks
Question 5
(a)
What do you mean by drift and diffusion current?
3 Marks
(b)
Differentiate: Type I and Type II superconductors.
4 Marks
(c)
Explain: Four Point Probe technique (for Bulk sample)
7 Marks
OR OPTION
(a)
State: Formula for Fermi`s Golden Rules.
3 Marks
(b)
Calculate the critical current which can flow through a long thin superconducting wire of diameter 10-3 m. Given Hc=7.9 X10 3 amp/m
4 Marks
(c)
Write a brief note on Visible Spectroscopy and state its applications.
7 Marks
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About this Examination Paper & Attribution
Official Gujarat Technological University (GTU) examination paper and step-by-step solutions for Physics (Summer 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.