Electronic Devices and circuits Theory-Diode Applications Questions and Answers
The Diode Applications section under Electronic Devices and Circuits Theory helps you understand how diodes work in real circuits. Although it’s part of electronics theory, solving related reasoning questions and answers builds analytical skills essential for interpreting circuit behavior. Key topics include rectifiers, clippers, clampers, voltage regulators, and signal demodulators. These concepts frequently appear in GATE, DRDO, ISRO, and PSU technical exams. Practicing electronics aptitude questions with explanations improves your ability to analyze, calculate, and troubleshoot circuit-based problems efficiently. Start exploring diode application questions with answers to master the fundamentals of semiconductor devices and strengthen your problem-solving approach.
Electronic Devices and circuits Theory-Diode Applications
21. There is a small amount of current across the barrier of a reverse-biased diode. This current is called
- forward-bias current.
- reverse breakdown current.
- conventional current.
- reverse leakage current.
22. As the forward current through a silicon diode increases, the voltage across the diode
- increases to a 0.7 V maximum.
- decreases.
- is relatively constant.
- decreases and then increases.
23. Doping of a semiconductor material means
- that a glue-type substance is added to hold the material together.
- that impurities are added to increase the resistance of the material.
- that impurities are added to decrease the resistance of the material.
- that all impurities are removed to get pure silicon.
24. The forward voltage across a conducting silicon diode is about
- 0.3 V.
- 1.7 V.
- –0.7 V.
- 0.7 V.
25. The most common type of diode failure is a(n) ________.
- open
- short
- resistive
- [NIL]
26. What occurs when a conduction-band electron loses energy and falls back into a hole in the valence band?
- doping
- recombination
- generation
- [NIL]
27. The maximum number of electrons in each shell of an atom is
- 2.
- 2n2 where n is the number of the shell.
- 4.
- 8.
28. A silicon diode is forward-biased. You measure the voltage to ground from the anode at ________, and the voltage from the cathode to ground at ________.
- 0 V, 0.3 V
- 2.3 V, 1.6 V
- 1.6 V, 2.3 V
- 0.3 V, 0 V
29. The term bias in electronics usually means
- the value of ac voltage in the signal.
- the condition of current through a pn junction.
- the value of dc voltages for the device to operate properly.
- the status of the diode.