ASSIGNMENT

CHAPTER-1

Q- 1Short questions:

Give definition:1) intrinsic semiconductor 2) extrinsic semiconductor

3) P-type material& N-type material

Q-2 Answer the following questions:

1) Explain P-N junction diode in forward and reverse bias condition.

2) Explain char. Of P-N junction diode

3) Which type of rectifier is generally used in electronics circuits ?Explain the

working with neat sketch.

4) Explain working of half wave rectifier with all necessary diagram & derive

expressions for Edc, Idc & Irms.

5) Explain necessity of filter in rectifier and explain types of filter in detail.

6) Explain full wave rectifier with diagram and derive value of Irms & Idc for it.

7) Explain formation of P-N junction diode by alloy method and epitaxial method

CHAPTER-2

Q:1)short questions:

1. Give definition: leakage current, Biasing, Amplifier, Load line

2. Explain need of power amplifier.

3. Give names of different type of distortion in amplifier.

4. What is cross over distortion in class B amplifier.

5. Compare CB,CC,CE.

6. What is coupling? Why it is required?

Q:2) Answer the following questions:

1) Explain working of NPN transistor.

2) Explain common emitter amplifier with a neat diagram and explain function of

various component.

3) Explain char. Of common base amplifier with a neat diagram and explain

function of various component.

4) Explain relation between α and β.

5) Explain leakage current in transistor.

6) Explain biasing of transistor, requirements of biasing circuit and bias

stabilization.

7) State methods of biasing and explain any one.

8) Explain dc load line and operating point in detail.

9) Give difference between power amplifier and voltage amplifier.

10) Explain working of class A amplifier with waveforms.

11) Draw and explain class B push-pull amplifier.

CHAPTER-3

Short questions:

1. Define latching current and holding current with reference to SCR

2. State two application of LDR.

3. What are the advantages of FET?

4. State the advantages and disadvantages of RC phase shift oscillator

5. Which conditions are required for oscillator?

Long Questions

1. Give the classification of oscillators.

2. Write the requirement of oscillators.

3. Explain working principal of oscillator.

4. Explain Hartley oscillator.

5. Explain phase shift oscillator,

6. Explain wein bridge oscillator.

7. Explain piezo electric effect and draw circuit diagram for crystal oscillator

8. Explain zener diode as voltage regulator

9. Explain working of LED.

10. Explain working of photo transistor.

11. Draw and explain VI characteristics of SCR and explain holding current and latching

current.

12. Explain working of N channel JFET

13. Explain AC load control using DIAC and TRAIC.

CHAPTER-4

Short Questions:

1. Give the characteristics of ideal OPAMP.

2. Draw the pin connection of a IC-555

3. List the four advantages of IC.

Long Questions:

1. Draw block diagram of OP-AMP -741 and Explain each block in short.

2. Explain IC-741 as comparator.

3. Draw the functional bock diagram of IC 555 and explain it.

4. Draw the circuit of astable multivibrator using IC 555 and explain its working.

5. Explain IC-555 as a timer.

CHAPTER-5

Short Questions:

1. Write basic principle of SMPS.

2. Write the advantages of SMPS.

Long Questions:

1. Define and Explain load regulation and line regulation.

2. Explain Zener diode as a voltage regulator.

3. Draw the circuit of shunt regulator and explain its working.

4. Draw block diagram of SMPS and explain its working.

5. Explain uninterrupted power supplies