Electronic Devices and Circuits Theory-Semiconductor Questions and Answers
Electronic Devices and Circuits Theory–Semiconductor questions with answers are an essential part of electronics aptitude and competitive exams like GATE, ISRO, DRDO, and BARC. These aptitude questions and answers with explanations help students understand how semiconductors function in electronic circuits, including diodes, transistors, and PN junction theory. Practicing aptitude questions with solutions PDF versions allows learners to strengthen their problem-solving and analytical thinking in semiconductor physics. For aspirants preparing for placement tests or technical interviews, mastering semiconductor basics is crucial for scoring high and building solid conceptual clarity. Explore these aptitude test practice online sets to enhance your preparation effectively.
Electronic Devices and Circuits Theory-Semiconductor
21. 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.
22. 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.
23. The forward voltage across a conducting silicon diode is about
- 0.3 V.
- 1.7 V.
- –0.7 V.
- 0.7 V.
24. The most common type of diode failure is a(n) ________.
- open
- short
- resistive
- [NIL]
25. What occurs when a conduction-band electron loses energy and falls back into a hole in the valence band?
- doping
- recombination
- generation
- [NIL]
26. The maximum number of electrons in each shell of an atom is
- 2.
- 2n2 where n is the number of the shell.
- 4.
- 8.
27. 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
28. 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.