Anna university Questions papers

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  HERE you can download Anna university previous year B.E/B.Tech Question papers and two marks with answer for  all subjects in p.d.f format.

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 Sample EDC model question paper(2nd sem):        


                B.E./B.Tech. DEGREE EXAMINATION, JUNE 2010.
                              SECOND SEMESTER
             ( Common to Biomedical Engineering,CSE, ECE, IT)
   Time: Three hours                                                  Maximum: 100 marks

                           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 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)
(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 µ F. If the switch is closed when f = 30°. Determine the
current equation. (Marks 8)
(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)
(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)
(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)
(b) Write detailed notes on:
(i) DIAC and TRIAC (Marks 5)
(ii) Photodiode and Phototransister (Marks 5)
(iii) LED and LCD (Marks 6)




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