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Wednesday, 27 March 2013

Anna University Previous Year Question Paper Anna University 2nd Semester Nov/Dec 2012

Anna University Nov / Dec 2013 Previous Year Question Paper Anna University Second Semester Question Paper

Anna University 2nd Semester Previous Semester Question Paper

Anna University Model Question paper

Anna University Second Semester Question Paper

University : Anna University, Chennai

Semester : Second

Department : Common To All Branches

List Of Subjects

HS2161 Technical English � II

MA2161 Mathematics � II

PH2161 Engineering Physics � II

CY2161 Engineering Chemistry � II

ME2151 Engineering Mechanics

EE2151 Circuit Theory
EC2151 Electric Circuits and Electron Devices

GE2151 Basic Electrical & Electronics Engineering

GE2152 Basic Civil & Mechanical Engineering

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Second Semester Question Paper - Nov/Dec 2012

Previous Year Question paper

Anna University Question paper Nov/Dec 2013

Latest Question Paper Model

Friday, 18 January 2013

Mathematics II Nov/Dec 2012 Question paper Second Semester Regulation 2008

Anna University,Chennai

Regulation :2008

Subject :MA2161-Mathematics II

Semester :II

Download Question Paper Here

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Friday, 27 July 2012

EC2151 ELECTRIC CIRCUITS AND ELECTRON DEVICES(ECED) RE-EXAM SPECIAL IMPORTANT QUESTIONS AND ANNA UNIVERSITY PREVIOUS SEMESTER QUESTION PAPERS

EC2151 ELECTRIC CIRCUITS AND ELECTRON DEVICES

ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER

UNIT I CIRCUIT ANALYSIS TECHNIQUES

UNIT II TRANSIENT RESONANCE IN RLC CIRCUITS

UNIT III SEMICONDUCTOR DIODES

UNIT IV TRANSISTORS

UNIT V SPECIAL SEMICONDUCTOR DEVICES

EC2151 ELECTRIC CIRCUITS AND ELECTRON DEVICES ECED NOV/DEC 2010 ANNA UNIVERSITY QUESTION PAPER

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2010
Second Semester
Computer Science and Engineering
EC 2151 � ELECTRIC CIRCUITS AND ELECTRON DEVICES
(Common to Biomedical Engineering, Electronics and Communication Engineering
and Information Technology)
(Regulation 2008)
Time : Three hours Maximum : 100 Marks
Answer ALL questions
PART A � (10 � 2 = 20 Marks)

1. Find Req of the restive network .
2. Determine the current drawn by the source as shown in
3. For the circuit shown in fig.3 determine the value of Q at resonance and
Bandwidth of the circuit.
4. A Series RC circuit consists of resistor of 10[1] and a capacitor of 0.1F as shown
in Fig.4. A constant voltage of 20v is applied to the circuit at t=0. Determine
voltage across resistor and capacitor.
5. State Mass-Action law.
6. Define diffusion capacitance.
7. Define Base width modulation and bring out its consequences.
8. Mention the advantages of MOSFET over JFET.
9. Draw the two transistor model of an SCR with its characteristic curve.
10. Under what principle does a photo voltaic cell work?

PART B � (5 � 16 = 80 Marks)

11. (a) (i) Use Thevenin's theorem to find the current through 5 resistor (Marks 8)
(ii) Find the voltage across 2 resistor in fig.6 by using super position theorem. (Marks 8)
Or
(b) (i) Determine current flowing through the 5 resistor in the circuit Norton theorem. (Marks 8)
(ii) Determine the maximum power delivered to the load in the circuit (Marks 8)

12. (a) (i) Find the complete solution for the current in a RLC circuit for a sinusoidal input. (Marks 8)
(ii) The circuit consists of R = 10, L = 0.5 H and C = 200 � F. If the switch is closed when f = 30�. Determine the current equation. (Marks 8)
Or
(b) (i) Consider the single tuned circuit
1. Resonant frequency
2. Output voltage at resonance and
3. Maximum output voltage.
Assume Rs>>wrL, and k=0.9. (Marks 8)
(ii) With neat diagram, obtain gain of a double tuned amplifier with critical value of mutual inductance. (Marks 8)

13. (a) (i) State continuity equation and prove that concentration of changes is independent of time with zero electric field. (Marks 8)
(ii) With neat diagram, explain the formation of PN junction and derive its depletion width. (Marks 8)
Or
(b) (i) What is the breakdown mechanism found in Zener diode? Explain it with neat diagram. (Marks 8)
(ii) Write detailed notes on space charge and diffusion capacitance. (Marks 8)

14. (a) Explain the construction and working principle of a JFET and obtain its characteristic parameters. (Marks 16)
Or
(b) Explain the operation of a Depletion mode MOSFET and its comparison over enhancement MOSFET with neat diagrams. (Marks 16)

15. (a) Discuss the construction and operation of a Tunnel Diode with neat energy band diagram. (Marks 16)
Or
(b) Write detailed notes on:
(i) DIAC and TRIAC (Marks 5)
(ii) Photodiode and Phototransister (Marks 5)
(iii) LED and LCD (Marks 6)