FYBCS : Semester 1 : Electronics 1: Important Questions.

 Chaper 1: Semiconductor diodes

2 marks

-Q. Draw symbols for PNP & NPN transistor.

Q. Draw symbol for photodiode.

Q. Draw circuit symbol for zener diode.

Q. Draw circuit symbol for LED.

Q. What is zener effect and zener breakdown.

4 marks

Q. Explain action of zener diode as regulator with help of neat diagramg.

-Q. Explain working of photodiode. and it's application.

---Q. Explain the working principle of optocoupler.

Q. Write a short note on solar cell.

Chapter 2: Bipolar Junction Transistor (BJT)

2 mark

-Q. Define Q point and list the factors affecting stability of the transistor.

Q. State different types of transistor configurations. Which one is widely used.

--Q. Draw output IV characteristics of BJT in CE mode and show all regions in it. 

Q. What are the biasing conditions of transistor to work as a class A amplifier.

Q. What is biasing.

Q. Define the terms gain and bandwidth of an amplifier.

Q. find alpha if beta=50.

4 mark

----Q. Differentiate between CC, CB and CE configuration of transistor.

Q. Explain voltage divider biasing technique for BJT.

---Q. Define alpha and beta of transistor. Derive relationship between them.

----Q. Explain how transistor act as switch.

Chapter 3: MOSFET

4 mark

Q. Explain the working of MOSFET as switch.

-Q. Explain construction and working of n-channel DMOSFET.

Q. Explain working of n-channel E-Mosfet.

Chapter 4: Power Supply

2 mark

Q. Explain Line and load regulation for power supply.

-Q. State the working principle of transformer.

--Q. Distinguish between half wave and full wave recitfier.

Q. Define frequency response of ideal low pass and high pass filter. 

4 mark

Q. State the applications of following types of transformers:

1- step up 2- step down 3-isolation 4-centre tapped

--Q. Draw block diagram of power supply and give function of each block.

Q. Draw a circuit diagram of full wave rectifier and explain in detail.

Q. Distinguish between half wave and bridge rectifier.

Q. Draw neat circuit diagram and explain bridge rectifier.

Chapter 5: Oscillators

Chapter 6: Data Converters

2 marks

Q. How many comparators are required for 3-bit flash ADC/

Q. What is the role of data converters.

Q. List any two applications of ADC.

Q. Explain 2 bit flash type adc

Q. explain working of single slope adc.

-Q. Explain working of succcessive approximation ADC with enat diagram.

5 Mark

---Q. Define following parameters with reference to ADC.

1. Resolution 2. Linarity 3. Conversion time  4. Quantization error 5.. Accuracy