B 03GAPHT121122403 Pages: 2
Reg No.:_______________ Name:__________________________
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
First Semester B.Tech Degree Regular Examination December 2024 (2024 Scheme)
Course Code: GAPHT121
Course Name: PHYSICS FOR INFORMATION SCIENCE
Max. Marks: 60 Duration: 2 hours 30 minutes
PART A
(Answer all questions. Each question carries 3 marks) CO Marks
1 Write any three important postulates of classical free electron theory. CO1 (3)
2 What is meant by critical field in superconductors? Explain the variation of CO1 (3)
critical field with temperature.
3 Explain the natural broadening of spectral lines emitted from an exited atom CO2 (3)
by using Heisenberg’s uncertainty principle.
4 Explain the phenomena of Quantum mechanical tunnelling. CO2 (3)
5 What are extrinsic semiconductors? How are they formed? CO3 (3)
6 What is biasing? Explain the effects of forward biasing in a diode. CO3 (3)
7 Explain the process of Zener breakdown in diodes. CO4 (3)
8 How light is produced in an LED? Give any two advantages of LEDs over CO4 (3)
other conventional lamps.
PART B
(Answer any one full question from each module, each question carries 9 marks)
Module -1
9 a) Obtain the expressions for current density and electrical conductivity of a CO1 (6)
metallic conductor in terms of the concentration of free electrons in it.
b) In a metal, consider the energy level lying 0.01eV above the Fermi level. CO1 (3)
What is the probability of this level being occupied by an electron at 300K.
Given Boltzmann constant= 1.38 × 10−23 J/K.
10 a) Compare Type I and Type II superconductors with proper figures. Write two CO1 (6)
examples for both.
b) Write six applications of superconductors in various fields. CO1 (3)
Page 1 of 2
Reg No.:_______________ Name:__________________________
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
First Semester B.Tech Degree Regular Examination December 2024 (2024 Scheme)
Course Code: GAPHT121
Course Name: PHYSICS FOR INFORMATION SCIENCE
Max. Marks: 60 Duration: 2 hours 30 minutes
PART A
(Answer all questions. Each question carries 3 marks) CO Marks
1 Write any three important postulates of classical free electron theory. CO1 (3)
2 What is meant by critical field in superconductors? Explain the variation of CO1 (3)
critical field with temperature.
3 Explain the natural broadening of spectral lines emitted from an exited atom CO2 (3)
by using Heisenberg’s uncertainty principle.
4 Explain the phenomena of Quantum mechanical tunnelling. CO2 (3)
5 What are extrinsic semiconductors? How are they formed? CO3 (3)
6 What is biasing? Explain the effects of forward biasing in a diode. CO3 (3)
7 Explain the process of Zener breakdown in diodes. CO4 (3)
8 How light is produced in an LED? Give any two advantages of LEDs over CO4 (3)
other conventional lamps.
PART B
(Answer any one full question from each module, each question carries 9 marks)
Module -1
9 a) Obtain the expressions for current density and electrical conductivity of a CO1 (6)
metallic conductor in terms of the concentration of free electrons in it.
b) In a metal, consider the energy level lying 0.01eV above the Fermi level. CO1 (3)
What is the probability of this level being occupied by an electron at 300K.
Given Boltzmann constant= 1.38 × 10−23 J/K.
10 a) Compare Type I and Type II superconductors with proper figures. Write two CO1 (6)
examples for both.
b) Write six applications of superconductors in various fields. CO1 (3)
Page 1 of 2
