Loyola College B.Sc. Physics April 2008 Applied Electronics Question Paper PDF Download

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

           B.Sc. DEGREE EXAMINATION – PHYSICS

FG 8

THIRD SEMESTER – APRIL 2008

PH 3106 – APPLIED ELECTRONICS

 

 

 

Date : 29-04-08                  Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

Part – A

Answer ALL Questions.                                                                                            (10×2=20)

  1. With neat Fermi diagrams explain what happens to the Fermi level when donors are added to an intrinsic semiconductor.
  2. Write a note on Light Emitting Diodes.
  3. State any four properties of an ideal Op-amp.
  4. With a neat diagram, explain how an Op-amp may be used as an integrator.
  5. What are don’t care states in K-maps?
  6. Simplify using Boolean identities.
  7. Discuss the racing condition in a JK flip-flop.
  8. Draw the circuit diagram of a three bit ring counter.
  9. Write a note on the registers of the processor.
  10. Write a note on the memory hierarchy in a computer.

Part – B

Answer any FOUR.                                                                                                   (4×7.5=30)

  1. With neat diagrams explain the working of common emitter and common base transistor amplifiers.
  2. With a neat diagram, explain the working of a four bit binary weighted D/A convertor.
  3. With neat diagrams explain how NAND gates may be used as universal building blocks.
  4. With a neat diagram explain the working of an RS flip-flop.
  5. Write notes on Cache and Virtual memories of a computer.

Part – C

Answer any FOUR.                                                                                                   (4×12.5=50)

  1. With a plot of the volt-ampere characteristics of a zener diode, explain how it may be used as a voltage regulator.
  2. With neat diagrams, explain the working of a four bit counter A/D converter.
  3. With circuit neat diagrams, explain the working of a full adder and a half subtractor.    (7+5.5)
  4. With neat circuit and wave diagrams explain the working of a four bit ripple counter.
  5. Write notes on RAM, ROM, EEPROM, UVEPROM. (3+3+3+3.5)

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