Exam Details
| Subject | Electrical And Electronics Engineering Materials | |
| Paper | ||
| Exam / Course | B.Tech. VIEP- Electrical Engineering III (BTCSVI/BTECVI/BTELVI) | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | December, 2015 | |
| City, State | new delhi, |
Question Paper
What are Miller indices? Name at least six features of Miller indices.
Find the Miller indices of a plane that makes intercepts 1 on x-axis, 2 on y-axis and is parallel to z-axis. Also sketch the plane in a simple cubic cell. 5
Explain Bragg's law of X-ray diffraction. Show that the condition for reflection is given by 2d sin nA.
The Bragg's angle for first order deflection from plane in a crystal is when. the wavelength of X-ray is 1·75 A. Calculate the lattice parameter . Given (111).
3. Give a brief account of the band theory of solids. Explain the classification of solids into conductors, semiconductors and insulators. on the basis of band theory.
Define the terms mean free path mobility and collision time Ct).
On the basis of electron theory, show that the expression of conductivity is given by
<img src='./qimages/13200-4b.jpg'>
Explain the Hall effect in semiconductor material.
Discuss the Type I and Type II super conductors with relevant diagrams.
As the concentration of electrons in a semi-conductor is changed by changing the impurity level, the conductivity also changes. Show that it passes through a minimum, when ne =ni sqrt(uh/ue) and find the minimum value. n1 is the intrinsic concentration.
The resistivity of pure germanium at room' temperature is 0·47 ohm-m. Find the carrier density of Germanium at the room temperature for the electron mobility of 0.42m^2/volt-sec and hole mobility of
0·20m^2/volt-sec.
7. What are drift current and diffusion current Find the expression for each of t.hem. Also derive the expression of the continuity equation.
Explain the origins of permanent magnet dipoles in matters.
The saturation induction of Nickel is 0.65 Tesla. If the density of Nickel is 8906 kg/m^3 and the atomic weight is 58·7, calculate the magnetic moment of Nickel atom. Avogadro number is 6·23 x 10^26/mole.
Distinguish between ferromagnetism and antiferromagnetism.
Explain domain theory for ferromagnetic materials.
10. Write short notes on any two of the following:
Crystal growth
Low resistivity materials versus High resistivity materials
IGFET
Permanent magnet materials
Find the Miller indices of a plane that makes intercepts 1 on x-axis, 2 on y-axis and is parallel to z-axis. Also sketch the plane in a simple cubic cell. 5
Explain Bragg's law of X-ray diffraction. Show that the condition for reflection is given by 2d sin nA.
The Bragg's angle for first order deflection from plane in a crystal is when. the wavelength of X-ray is 1·75 A. Calculate the lattice parameter . Given (111).
3. Give a brief account of the band theory of solids. Explain the classification of solids into conductors, semiconductors and insulators. on the basis of band theory.
Define the terms mean free path mobility and collision time Ct).
On the basis of electron theory, show that the expression of conductivity is given by
<img src='./qimages/13200-4b.jpg'>
Explain the Hall effect in semiconductor material.
Discuss the Type I and Type II super conductors with relevant diagrams.
As the concentration of electrons in a semi-conductor is changed by changing the impurity level, the conductivity also changes. Show that it passes through a minimum, when ne =ni sqrt(uh/ue) and find the minimum value. n1 is the intrinsic concentration.
The resistivity of pure germanium at room' temperature is 0·47 ohm-m. Find the carrier density of Germanium at the room temperature for the electron mobility of 0.42m^2/volt-sec and hole mobility of
0·20m^2/volt-sec.
7. What are drift current and diffusion current Find the expression for each of t.hem. Also derive the expression of the continuity equation.
Explain the origins of permanent magnet dipoles in matters.
The saturation induction of Nickel is 0.65 Tesla. If the density of Nickel is 8906 kg/m^3 and the atomic weight is 58·7, calculate the magnetic moment of Nickel atom. Avogadro number is 6·23 x 10^26/mole.
Distinguish between ferromagnetism and antiferromagnetism.
Explain domain theory for ferromagnetic materials.
10. Write short notes on any two of the following:
Crystal growth
Low resistivity materials versus High resistivity materials
IGFET
Permanent magnet materials
Other Question Papers
Departments
- Centre for Corporate Education, Training & Consultancy (CCETC)
- Centre for Corporate Education, Training & Consultancy (CCETC)
- National Centre for Disability Studies (NCDS)
- School of Agriculture (SOA)
- School of Computer and Information Sciences (SOCIS)
- School of Continuing Education (SOCE)
- School of Education (SOE)
- School of Engineering & Technology (SOET)
- School of Extension and Development Studies (SOEDS)
- School of Foreign Languages (SOFL)
- School of Gender Development Studies(SOGDS)
- School of Health Science (SOHS)
- School of Humanities (SOH)
- School of Interdisciplinary and Trans-Disciplinary Studies (SOITDS)
- School of Journalism and New Media Studies (SOJNMS)
- School of Law (SOL)
- School of Management Studies (SOMS)
- School of Performing Arts and Visual Arts (SOPVA)
- School of Performing Arts and Visual Arts(SOPVA)
- School of Sciences (SOS)
- School of Social Sciences (SOSS)
- School of Social Work (SOSW)
- School of Tourism & Hospitality Service Sectoral SOMS (SOTHSM)
- School of Tourism &Hospitality Service Sectoral SOMS (SOTHSSM)
- School of Translation Studies and Training (SOTST)
- School of Vocational Education and Training (SOVET)
- Staff Training & Research in Distance Education (STRIDE)
Subjects
- Active Filter Design
- Advanced Control System
- Advanced Power Electronics
- Applied Electromagnetics
- Basics Of Electrical Engineering
- Computer Process Control
- Control System
- Digital Electronics
- Electric Energy Utilization
- Electrical And Electronics Engineering Materials
- Electrical Instrumentation
- Electrical Machine - I
- Electrical Machines - Ii
- Electrical Machines And Electronics
- Electrical Measurements And Measuring Instruments
- Electro Mechanical Energy Conversion - I
- Electro-Mechanical Energy Conversion - Ii
- Electro-Mechanical Energy Conversion-Iii
- Electromagnetic Theory
- Energy Auditing And Analysis
- High Voltage Engineering
- Industrial Drives
- Micro Controllers
- Microprocessor And Applications
- Network Theory
- Power Quality Issues And Remedial Measures
- Power System
- Power System - I
- Stochastic Control Systems
- Switchgear And Protection