Electronic Devices and Circuits Important Questions

Title :Electronic Devices and circuits.

Important questions

                               Unit :1   (PN JUNCTION DIODES )

   Essays:

1.     Explain the construction ,working and V-I characteristics of PN junction diode?

2.     Explain the construction ,working and V-I characteristics of Tunnel diode?

3.     Explain the construction ,working and V-I characteristics of Zener diode?

Shorts:

4.     Explain the construction ,working and V-I characteristics of Varactor diode?

5.     Write a short note on Tunneling effect?

6.     Discuss the effect of temperature on reverse saturation current?

7.     Write a short note on Barrier potential?

8.     Explain Zener diode as a voltage regulator?

9.     Define diode current equation.?

                                 Unit :2  (BJT and its Biasing )

 Essays:

 1.  Explain the construction ,working and V-I characteristics of CB Amplifier (OR) Draw the experimental arrangement of CB Amplifier and explain?

 2.  Explain the construction ,working and V-I characteristics of CE Amplifier (OR) Draw the experimental arrangement of CE Amplifier and explain?

 3.   Explain the construction ,working and V-I characteristics of CC Amplifier (OR) Draw the experimental arrangement of CC Amplifier and explain?

 4.   Distinguish between CB,CE,CC Configurations?

 5.  Distinguish between NPN & PNP Transistor working?

 6.  Define Biasing ? Explain Voltage –Divider biasing?

Shorts: 

 7.  Explain the current components in Transistor?

 8.  Explain Transistor as a Switch?

 9.  Write a short notes on Hybrid equivalent model for transistor (OR)  Write a short notes  on H- parameters  in CE configuration ?

 10.  Explain the relation between α , β, ϒ

 11.Write a short note on Fixed biasing?

 12.Write a short note on Emitter-Stabilized Bias?

 13. Explain the thermal run away problem?

 14.What is Biasing ? Explain the need for biasing?

 15.Discuss about stabilization factor?

                                   Unit :3 (FET,UJT & SCR )

     Essays :
  1.     Explain the construction ,working and V-I characteristics of JFET? 
  2.     Explain Drain and Transfer Characteristics of FET ?( OR ) Explain the experimental          set up to study the FET Characteristics ?
  3.     Explain the construction ,working and V-I characteristics of UJT ? 
  4.     Explain the construction ,working and V-I characteristics of Enhancement               MOSFET? 
  5.     Explain the construction ,working and V-I characteristics of Depletion MOSFET? 
  6.     Explain the construction ,working and V-I characteristics of SCR? 
  7.     Explain the experimental set up to study the SCR Characteristics ? 
  8.Explain the construction ,working of two transistor representation of SCR ?

    Shorts 
 9.    Write a short note on FET parameters ? (OR) Explain the relation between r_d ,g_m
10.Write a short note on FET Biasing ? 
11.Explain UJT as a Relaxation oscillator ? 
12. Write a short note on SCR applications ? (OR) Explain SCR as power control device

   13.Distinguish between BJT & FET? 
   14.Distinguish between FET & MOSFET? 
   15. Distinguish between UJT,BJT & FET                                                                                                      Unit : 4  ( Photo Electric Devices )

     Essays: 
     1.  Explain the construction ,working and V-I characteristics of photo diode and   

  photo transistor? 
2.Explain the construction ,working and V-I characteristics of LED? 
3.     Explain the construction ,working and V-I characteristics of LDR?

     Shorts : 
   4.     Explain the construction ,working of Opto-Isolator? 
   5.     Explain the construction ,working of IR Emitters ? 
   6.     Write  a short note on Photo diode ? 
   7.     Write a short note on Photo transistor ?

                                 Unit : 5 ( Power Supplies )

    Essays:

   1.   Explain the construction ,working of half wave Rectifier and calculate its efficiency          & ripple factor ?

  2.  Explain the construction ,working of full wave Rectifier and calculate its efficiency         & ripple factor ? (OR) Explain the construction ,working of center tap full wave             Rectifier and calculate its efficiency  & ripple factor ?

  3.  Explain the construction ,working of full wave Rectifier Bridge rectifier? (OR)               Explain the construction ,working of Bridge rectifier?

  4.  Explain  the principle of  SMPS with its block diagram?

  5.  Explain L-section & π-section filters with wave forms ? 

Shorts:

6.  Distinguish between half wave rectifier & Full wave rectifier?

7.  Write a short note on series inductor filter (OR) Write a short note on Choke filter

8.  Write a short note on IC voltage Regulator ?

9.  Write a short note on Shunt Voltage regulator ?

10.Distinguish between SMPS and Linear power supply ?

11.Draw the circuit diagram of L-section filter for bridge rectifier ?

12. Draw the circuit diagram of L-section filter for full wave rectifier

13. Draw the circuit diagram of L-section filter for half wave rectifier

14. Draw the circuit diagram of π-section filter for bridge rectifier

15. Draw the circuit diagram of π-section filter for full wave rectifier

16.Draw the circuit diagram of π-section filter for half wave rectifier