ELECTRONIC DEVICES & CIRCUITS IMP 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 acts 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 & it’s working?

6. Define Biasing? Explain Voltage –Divider biasing?

Shorts: 

7. Explain the current components in a Transistor?

8. Explain Transistor acts as a Switch?

9. Write a short notes on Hybrid equivalent model for a 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?

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

 µ?

10. Write a short note on FET Biasing ?

11. Explain UJT acts as a Relaxation oscillator ?

12. Write a short note on SCR applications ? (or) Explain SCR acts 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 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?