SHREE SWAMINARAYAN INSTITUTE OF TECHNOLOGY,
BHAT, GANDHINAGAR
SUB: BASIC ELECTRONICS Subject Code : BE01000111
QUESTION BANK
Q1. What is PN junction diode? What is external bias? Describe its forward and reverse bias
conditions with appropriate diagram.
Q2. What is Zener breakdown? What is avalanche breakdown? Compare both the type of
breakdown.
Q3. Describe diode approximations in detail.
Q4. Define DC load line for a diode and explain the DC load line and Q point for circuit
consisting of supply voltage in series with resistance and diode.
Q5. Explain half wave rectifier with neat diagram and also draw the output waveform.
Q6. Draw circuit diagram of Center-taped full wave rectifier and explain its operation with
necessary waveforms and derivation of Vdc.
Q7. Explain full wave bridge rectifier with neat diagram. Explain advantage and disadvantage of
bridge rectifier over full wave rectifier.
Q8. State the applications of Rectifier, and Comparison of Halfwave, Full-wave center- tap and
Full-wave Bridge rectifier.
Q9. Why Zener diode can be used as voltage regulator? Describe RC filter with its limitations.
Q10. Explain the different types of clipping circuits with their different names and input-output
waveforms.
Q11. Explain positive and negative voltage clamper circuit with waveforms.
Q12. Draw & explain voltage multiplier and explain its operation.
Q13. Draw the symbol of NPN & PNP transistor, write its different operating regions and also
explain why it is called as “Bipolar Transistor”. Also state the advantage of transistor.
Q14. Discuss Common Collector (CC) configuration of transistor and explain its input and
output characteristics. Derive the expression for the collector current and gain. 07
Q15. Discuss Common emitter (CE) configuration of transistor and explain its input and output
characteristics. Draw and explain the output characteristics and explain active, saturation and
cutoff regions. 07
Q16. Discuss Common Base(CB) configuration of transistor and explain its input and output
characteristics. 07
Q17. Compare CE, CB, and CC configuration with respect to different transistor characteristics.
07
Q18. Why biasing is important in transistor? Explain voltage divider bias with diagram. 07
Q19. What is stability factor? Explain. Describe the factors affecting the Stability of Q point.
Derive the relation between current gain α and β and Y. (3 to 4 marks for each)
Q20. What is an Early effect, and how can it account for the CB input characteristics? 04
Q21. Draw the fixed-biased circuit by considering an n–p–n transistor in the CE mode. 04
Q22. What is self-bias? Draw the circuit showing self-bias of an n–p–n transistor in the CE
mode. Explain physically how the self-bias improves stability. 07
Q23. Discuss load line, Q point, DC & AC load lines for BJT. 07
Q24. Explain the selection of a Q point for a transistor bias circuit and discuss the limitations on
the output voltage swing. 07
Q25. Draw h parameter equivalent model for CE amplifier and derive the equation for input
impedance, output impedance, Voltage gain and current gain for CE amplifier. 07
Q26. Explain following diodes in details. (3 to 4 marks of each)
1. Schottky diode
2. Varactor diode
3. PIN diode (Also Compare Photo Diode and PIN diode)
4. Photo Diode
Q27. Describe the construction, the symbol, V-I characteristics and application of Tunnel diode.
07
Q28. Explain LED diode. Advantage, disadvantage and application of LED. 04
Q29. Write a short note on seven segment display with diagram. 07
Q30. Describe construction, working principle and applications of Solar cell. 07
Q31. Briefly explain the effect of coupling capacitor and bypass capacitor on small signal
transistor amplifier. What is use of coupling and bypass capacitor? 07
Q32. Explain the working of Emitter follower. List out the salient feature of emitter follower. 07
Q33. Explain in detail different models used for AC analysis of BJT circuits. 07
Q34. Explain the properties and application of common base amplifier. 03
Q35. Analyze and explain CB amplifier and find its input impedance, output impedance and
voltage gain 07
Q36. Draw and explain the transistor a.c. equivalent circuit. 07
Q37. Draw single stage CE amplifier and analyze and explain how it works. 07
Q38. Compare the different characteristics of the following semiconductor devices: bipolar
junction transistor, field-effect transistor (BJT & FET). 07
Q39. What is FET? State important features of FET. State, disadvantage and application of FET.
07
Q40. Write and explain application of FET as amplifier and as a switch. 07
Q41. Explain the construction, working and drain characteristics of N- Channel JFET. 07
Q42. Explain the JFET parameters and establish the relationship between them. 07
Q43. Draw and explain various characteristic of JFET. Explain in brief applications of JFET.
Advantages of JFET. Also give Difference between MOSFET and JFET. Define saturation
current, pinch off voltage and transconductance in JFET. What are the advantage of N-Channel
MOSFET over P-Channel MOSFET. (Each topic covers 3-4 marks)
Q44. Explain E-type MOSFET with neat diagram. (N channel & P channel E MOSFET) 07
Q45. Explain D-type MOSFET with neat diagram. 07
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