Electronic Devices and Circuit Theory- Semiconductor Diodes Questions and Answers
Semiconductor Diodes are the foundation of modern electronic circuits, making this a critical topic for exams like GATE, DRDO, and BEL recruitment tests. In this section on Semiconductor Diodes questions with answers, you’ll explore PN junction behavior, biasing, IV characteristics, and diode applications such as rectifiers and clippers. Practicing these electronics aptitude questions with explanations helps you master semiconductor properties and understand real-world circuit applications. Whether you’re preparing for government technical exams or electronics placements, these questions will build your conceptual clarity and analytical approach toward diode-based circuits. Strengthen your fundamentals through consistent electronics MCQ practice and detailed problem-solving.
Electronic Devices and Circuit Theory- Semiconductor Diodes
1. The diode ________.
- is the simplest of semiconductor devices
- has characteristics that closely match those of a simple switch
- is a two-terminal device
- All of the above
2. It is not uncommon for a germanium diode with an Is in the order of 1–2 A at 25°C to have leakage current of 0.1 mA at a temperature of 100°C.
- TRUE
- FALSE
3. What does a high resistance reading in both forward- and reverse-bias directions indicate?
- A good diode
- An open diode
- A shorted diode
- A defective ohmmeter
4. What is the state of an ideal diode in the region of nonconduction?
- An open circuit
- A short circuit
- Unpredictable
- Undefined
6. The diffused impurities with ________ valence electrons are called donor atoms.
- 4
- 3
- 5
- 0
7. In which of the following color(s) is (are) LEDs presently available?
- Yellow
- White
- Orange
- All of the above
8. Determining rd to a high degree of accuracy from a characteristic curve is very accurate.
- TRUE
- FALSE
9. What is the range of the operating voltage level for LEDs?
- 5–12 mV
- 1.7–3.3 V
- 5–12 V
- 20–25 V
10. At what kind of operating frequency diffusion or transition is a capacitor represented in parallel with the ideal diode?
- Low frequency
- Moderate frequency
- Mid frequency
- Very high frequency