1. COMPUTER & INFORMATION TECHNOLOGY
IMPORTANT QUESTIONS FOR SEMESTER EXAM
SUB- ETX
Prepared by – Mr. Vijay Balu Raskar
vijayraskar2003@yahoo.co.in
vbr_fehod@yahoo.com
S NO. NAME OF CHAPTER MARKS
1 Introduction to Electronics 04
2 Semiconductor Theory 10
3 Semiconductor Diode 20
4 Rectifiers Filters and Regulators 20
5 Bipolar Junction Transistor 30
6 Field Effect Transistor 10
7 Integrated Circuits 06
NOTE:-
 Four important things to attend lecture.
 Scientific calculator.
 Blue, Black & Red color pens.
 Physically & mentally presence in the class.
 Try to practice examples at home.
 Be prepared for next class.
 Be regular as clock.
ALL THE BEST

2. 1. Introduction to Electronics
1. Explain the colour coding of resistors.
2.What is Q factor of Inductor?
3.Define Electronics and give its two applications.
4. Write a mathematical expression for a parallel plate capacitor.
5.What are the filter choke, A.F. choke, R.F. choke and IF choke?
6. List the type of Resistor, Inductor
2. Semiconductor Theory
1. Define Doping in Semiconductor.
2. Write a short note on semiconductor in details.
3. How extrinsic semiconductors are formed?
4. Draw energy band diagram of conductor and semiconductor.
5. Describe effect of temperature on conductivity of semiconductor.
6. Define :-
i. Doping
ii. Diffusion Current
iii. Drift Current
iv. Electron Volt
v. Valence Electron
vi. Forbidden Gap
vii. Free Electrons
7. Draw the energy band diagram of Germanium and Silicon conductor.
8. Why the conductivity of Germanium is more that of silicon at room
temperature?

3. 3. Semiconductor Diode
1. Explain the formation of depletion layer in P-N junction.
2. Define barrier potential of silicon diode.
3. Explain the operation of P-N junction under reverse bias condition.
4. Explain the operation of P-N junction under forward bias condition.
5. Explain the avalanche breakdown and zener breakdown.
6. VI characteristics of Diode.
7. List important application and draw symbol of LED.
8. Draw and explain Photodiode.
9. Explain point contact diode with application.
10. Draw and explain varactor diode with its application.
11. In what respect LED is different from an ordinary PN junction
diode.
4. Rectifiers Filters and Regulators
1. Draw and explain full wave rectifier.
2. Draw and explain half wave rectifier.
3. What is the need of filter circuits? And list its types
4. Describe the working principal of CLC filter with neat label diagram.
5. Compare RC and LC filter.
6. Draw label diagram of RC coupled amplifier. List the drawback.
7. Draw and explain π-filter.
8. Define the following:-
i. Ripple factor
ii. Form Factor
iii. Peak inverse Voltage (PIV) with its significance

4. iv. Rectification Efficiency
v. Transformer Utilization factor for a rectifier
vi. Stability Factor
vii. Ripple Regulation
9. Draw the block diagram of a regulated power supply.
10. What are the functions of bleeder resistor?
5. Bipolar Junction Transistor
1. Draw the symbol of NPN and PNP transistors.
2. Define the following parameters of a transistor (a) Alpha and (b)
Beta
3. What is transistor biasing?
4. Compare CE, EB and CC configuration.
5. Draw the DC load line for transistor as an amplifier and locate Q-
Point on it.
6. Explain switching action of a transistor.
7. Define Bandwith, Voltage Gain, Current Gain, Power Gain and Input
– output resistance of CE configuration.
8. State the different types of coupling methods.
9. Draw i/p and o/p characteristics of transistor in CE mode and show
all regions on it.
6. Field Effect Transistors
1. Why is the FET called as unipolar device?
2. Explain
(i) FET
(ii) MOSFET

5. (iii) JFET
(iv) BJT
3. Differentiate between
i. FET and BJT.
ii. FET and MOSFET
4. Define the following terms:-
i. Transconductance
ii. Dyanamic drain resistance
iii. Pinch-off voltage
iv. IDSS and IGSS
v. Cut-off Voltage
vi. Amplification factor
5. Draw symbol the following:-
i. MOSFET
ii. MOSFET (N-channel depletion)
iii. Drain characteristics of FET
iv. JFET (N channel and P-channel)
v. FET
7. Integrated Circuits
1. What is LSI and VLSI?
2. State different types of IC’s
3. List the advantages of IC over discrete component.
4. Give the classification and advantages of IC’s

6. MISCELLENOUS
1. Define depletion region for diode.
2. Draw the symbol of Step up and step down transformer.
3. Draw and Describe zener diode as voltage regulator.
4. Draw and explain fixed resistor biasing for transistor.
5. What are the properties of semiconductor?
6. Comparison between Insulator, Conductor and Semiconductor.
7. What is voltage divider biasing?