Important Questions for 2nd Semester Anna University Examinations

Important Questions for AU 2nd Semester

Anna University Important questions for 2nd Semester examinations that is likely to begin from July 20th,2012.
You may also know the 2nd Semester Exam time table , and the 2nd Semester Syllabus too.

Stau tuned to get important questions for all 2nd Semester subjects from studentsIdea , you can subscribe for Email Alerts here.

Anna Univ Important Questions for Mathematics II , Physics II , Chemistry II , Technical English II , Engineering Mechanics, Basic Civil & Mechanics , Electronic Circuits & Electron Devices , Circuit Theory , Basic Electrical & Electronics Engineering .

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Important Questions for Engineering Physics PH2111 1st Semester Anna University Jan Exams 2012

Anna Univ Important Questions for 1st Sem
Anna University Jan 2012 Exams for First Semester students of all zonal ( Trichy ,Combatore,Madurai,Tirunelveli,Chennai ) has been to start in few days.

You may like to read:
Anna Univ 1st Sem Syllabus here
Anna Univ 1st Sem Time Table here

Students are in more pressure for preparing the university exams ,here is the frequently asked important questions that you can follow.

ENGINEERING PHYSICS I

UNIT I
1.Explain the construction and production of ultrasonic waves using magnetostriction method with neat diagram
2. Explain the construction and working of piezo electric generator to produce ultrasonic waves.
3. Discuss the pulse echo system to identify the flaws using ultrasonics with neat detailed diagram
4. Describe the method of determining the velocity of ultrasonic waves using acoustic grating

UNIT II

1. Explain the construction and working of He-Ne laser using a neat energy level diagram
2. For atomic transitions, derive Einstein’s relations and hence deduce the expression for the ratio of spontaneous emission rate to the stimulated emission rate.
3. Explain the modes of vibration of CO2 molecule. Describe the construction and working of CO2 laser with necessary diagram.
4. Explain the principle, construction and working of a semiconductor hetero junction laser with necessary diagrams. Mention any two advantages of them.

UNIT III

1. Derive an expression for the numerical aperture and angle of acceptance of fiber in terms of refractive index of the core and cladding of the fiber.
2. Describe the double –crucible technique for producing optical fibers
3. Explain with a neat block diagram, the working of a fiber optical communication system
4. Describe the principle , construction and working of light emitting diode

UNIT IV
1. Discuss in details Compton Effect its experimental verification.
2. Derive Planck’s law for black body radiation and hence deduce Wien’s law and Rayleigh Jean’s law
3. Explain the working of TEM and SEM with neat diagram
4. Derive time independent Schrödinger wave equation and hence deduce time dependent Schrödinger wave equation

UNIT V
1. Explain in detail about crystal defects with neat diagram
2. Define the terms Atomic radius and packing factor. Calculate the same for BCC and FCC structures.
3. Explain in detail the crystal structures of Diamond, Graphite, Nacl and Zns.
4. Derive an expression for the inter planar spacing for (hkl) planes of a cubic structures.

Note: It doesnt mean that the questions given here are 100% assured to be on university question paper.It is just a guide for you my dear friends.

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Tags: Anna univ question papers,frequently asked questions,for first sem,1st sem,physics question paper,anna university 1st semester question paper,important questions for physics,important questions for 1st sem exams,B.E/B.Tech first sem important questions

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Principles Of Communication POC Important Questions fro Nov/Dec 2011 Anna Univ Exam

POC Important Questions for Anna Univ Exam Nov/Dec 2011
Get Important Questions for Principles of Communication 142304 ,anna university of Technology students will write POC exam on 25th Nov,2011.Here are some FAQ asked questions we've shaed with you.Make a note of this questions while preparing,but don't simply rely on this alone.Prepare well and Do Well!!

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142304 - PRINCIPLES OF COMMUNICATION


UNIT I

1. Write short notes on AM power distribution
2. In angle modulation, explain frequency devation, percent modulation, phase deviation and modulation index with suitable example
3. Compare FM and AM
4. Explain AM voltage distribution and AM power distribution
5. Derive the relationship between the voltage amplitudes of the side band frequencies and the carrier and draw the frequency spectrum
6. Derive an expression for the Amplitude modulated signal and draw its frequency spectrum

UNIT II
1. What is known as Binary phase shift keying? Discuss in detail the BPSK transmitter and Receiver and also obtain the minimum double sided Nyquist bandwidth
2. Explain the principle of FSK transmitter and receiver
3. Explain QPSK transmitter and receiver. Give bandwidth, baud, and its relevant equations with neat constellation and output waveforms
4. Illustrate the concept of 8 QAM transmitter with the truth table
5. Compare the various types of digital modulation techniques.

UNIT III

1. Explain ISI for NRZ input signal. Discuss about the causes of ISI.
2. What is called companding? Briefly discuss the Analog companding and digital companding
3. Explain the elements of PCM system with a neat block diagram
4. Describe the operations of DPCM system with relevant diagram
5. Determine 12-bit linear code, 8-bit compressed code, the decoded 12- bit code, the c quantization error and compression error for a resolution of 0.01 voltage for analog sample voltages of a) 0.083V b) -0.398Vc) +9.234V d) -20.124 V


UNIT IV


1. Write short notes on Frequency hop spread spectrum.
2. Discuss in detail about TDMA and CDMA
3. Give a detailed account of multiple access techniques
4. Discuss the frequency HOP spread spectrum with suitable diagram
5. Explain CDMA System with its features. Explain the various problems available in CDMA system. Compare TDMA & FDMA

UNIT V

1. Describe a satellite communication system with a suitable block diagram
2. Enumerate the elements of an optical fiber transmission link.
3. Write in detail on LEO and GEO orbits
4. Draw the neat diagram of satellite system link model. Explain its each part in detail.
5. Briefly describe the function of Optical Detectors.

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Important Questions for EDC - Electronics Device and Circuits 131303 - Anna Univ exam Nov/Dec 2011

Anna Univ Important Questions for EDC
Here is the important questions that you can keep in mind while preparing for your university exams.But bear in mind that it is solely taken from the frequently asked questions from anna univ.Don't simply rely on this questions alone.

131303 - Electronic Devices and Circuits

UNIT I

1. Explain the working of a PN junction forward bias and in reverse bias
2. Explain the operation of zener diode and define zener breakdown. Draw its VI characteristics.
3. With a neat sketch, explain the operation of PN junction diode
4. Define regulator. Explain the operation of any one type of regulator.
5. With a neat sketch, explain the operation of CLC and LC filter

UNIT II

1. Draw and explain input and output characteristics of common emitter configuration of a transistor
2. Explain in detail on voltage gain and current gain expressions for CB configuration using transistor hybrid model
3. Draw the input and output characteristics of N-P-N transistor in common base configuration and explain it. How the different hybrid parameters are found out from the above characteristics
4. Explain how the hybrid parameters hfe , hoe, hie, hre can be determined from the CE characteristics of a transistor .

UNIT III
1. Explain the principle of operation of N-channel JFET
2. Give a detailed description of construction and operation of JFET
3. Explain the working principle and characteristics of Depletion N-MOSFET under depletion mode and enhancement mode in detail
4. Derive the expression for Av, Ri, and Ro for CS JFET amplifier


UNIT IV
1. Draw the circuit diagram of a phase shift oscillator using BJT. Derive the expression for its frequency of oscillation. Determine the minimum hfe for the transistor
2. With suitable diagram explain the operation of Colpitts oscillator
3. Explain the principle of operation of crystal oscillator and give its application
4. Briefly discuss the effect of negative feedback on band width and stability of an amplifier

UNIT V
1. Explain the operation of Schmitt trigger using two transistor for a sinusoidal input
2. Explain the operation of UJT and draw the VI characteristics.
3. explain series and shunt clipper with suitable diagram
4. Draw the circuit diagram of collector coupled astable multivibrator and explain its operation with relevant operation. Derive the expression for time period

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Important Questions for 141302 Analog and Digital Communication,3rd Sem of CSE students - Anna Univ of Technology Nov/Dec 2011

For Anna University of Technology ,Computer Science Engg Students,here are the important questions for the subject ADC.
Get Analog and Digital Communication faq questions from each units,prepare well and do well.

Code:141302
Subject : Analog and Digital Comm .
Second Year Third Semester -For CSE Students

141302 - Analog and digital Communication

UNIT I

1. Explain how Carson’s rule of bandwidth in FM is obtained. For an FM modulator with peak frequency deviation f=5 kHz modulating frequency fm=5kHz, with amplitude of carrier 5V and frequency 500 kHz, determine the bandwidth using Carson’s rule

2. Derive an expression for a single tone FM signal and draw its frequency spectrum.

3. Define amplitude modulation. Drive the relation between the total transmitted power and carrier power in an AM system when several frequencies simultaneously modulated acarrier.

4. Define FM and PM modulation, derive their equations.

5. In angle modulation, explain frequency devation, percent modulation, phase deviation and modulation index with suitable example.


UNIT II

1. Explain with neat diagrams the FSK technique, transmitter and receiver blocks
2. With neat diagram explain the generation of a DPSK signal and recovering the data from
the DPSK signal
3. Explain quadrature amplitude modulation with the help of relevant diagrams.
4. Discuss the QPSK transmission system with relevant diagrams.

UNIT III

1. Explain PCM and differential PCM with the help of block diagrams.
2. Explain the basic principle of quantization and quantization error
3. What are the drawbacks of delta modulation and how are they overcome in adaptive delta
modulation? explain with the help of a neat block diagram
4. Describe DPCM transmitter and receiver with suitable block diagram.


UNIT IV
1. Explain the detail about the parallel interface with control signals and timing information
2. Explain the different types of data transmission
3. How are errors detected and corrected in data communication?
4. Discuss the following : Synchronous modem , Asynchronous modem ,Low speed modem ,medium and high speed modem

UNIT V
1. Explain fast and slow frequency hopping techniques used in spread spectrum.
2. With help of neat block diagram, explain DS spread spectrum system with coherent binary PSK
3. Compare TDMA,FDMA CSMA multiple access techniques.
4. Explain the working of multi pulse excited LPC and code excited LPC by suitable Diagrams
5. For a linear feedback shift register with three stages (m=3),evaluate the maximum length PN sequence for feedback taps =(3,1).Draw the schematic arrangement and verify all the properties of PN sequence in generated output. Sketch the sequence, its autocorrelation function and PSD function if chip rate is 10MHz.

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