Special-Purpose Diodes Questions and Answers
Special-purpose diodes like Zener, LED, Schottky, and Varactor diodes play key roles in modern electronic circuits. These devices are common in aptitude questions and answers with explanations for PSU, BARC, and GATE electronics exams. Each diode type serves unique purposes—Zener diodes regulate voltage, LEDs emit light, and Schottky diodes allow fast switching. Understanding their characteristics helps solve circuit-based numerical and theoretical problems. Practicing electronics aptitude questions with solutions PDF ensures thorough exam readiness and clarity on diode applications in real-world devices.
Special-Purpose Diodes
Showing 10 of
19 questions
1. Schottky diodes are also known as
- PIN diodes.
- hot carrier diodes.
- step-recovery diodes.
- tunnel diodes.n
2. Zener diodes with breakdown voltages less than 5 V operate predominantly in what type of breakdown?
- avalanche
- zener
- varactor
- Schottky
3. The Schottky diode is used
- in high-power circuits.
- in circuits requiring negative resistance.
- in very fast-switching circuits.
- in power supply rectifiers.
4. You have an application for a diode to be used in a tuning circuit. A type of diode to use might be
- an LED.
- a Schottky diode.
- a Gunn diode.
- a varactor.
5. What kind of diode is formed by joining a doped semiconductor region with a metal?
- laser
- tunnel
- pin
- Schottky
7. LEDs are made out of
- silicon.
- germanium.
- gallium.
- silicon and germanium, but not gallium.
8. The normal operating region for a zener diode is the
- forward-bias region.
- reverse-bias region.
- zero-crossing region.
- reverse-breakdown region.
9. A 6.2 V zener is rated at 1 watt. The maximum safe current the zener can carry is
- 1.61 A.
- 161 mA.
- 16.1 mA.
- 1.61 mA.
10. The process of emitting photons from a semiconductive material is called
- photoluminescence.
- gallium arsenide.
- electroluminescence.
- gallium phosphide.