Special-Purpose Diodes Questions and Answers

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Showing 10 of 19 questions
Q11
What diode operates only with majority carriers?
  • A laser
  • B tunnel
  • C Schottky
  • D step-recovery
Answer: Option C
Q12
What type of diode maintains a constant current?
  • A LED
  • B zener
  • C current regulator
  • D pin
Answer: Option C
Q13
What diode is used in seven-segment displays?
  • A zener
  • B LED
  • C laser
  • D Schottky
Answer: Option B
Q14
Zener diodes with breakdown voltages greater than 5 V operate predominantly in what type of breakdown?
  • A avalanche
  • B zener
  • C varactor
  • D Schottky
Answer: Option A
Q15
Back-to-back varactor diodes are used for what reason?
  • A over-voltage protection
  • B a wider tuning range
  • C to eliminate harmonic distortion
  • D no reason; only zeners are used in a back-to-back configuration
Answer: Option C
Q16
A tunnel diode is used
  • A in high-power circuits.
  • B in circuits requiring negative resistance.
  • C in very fast-switching circuits.
  • D in power supply rectifiers.
Answer: Option B
Q17
What type of diode is commonly used in electronic tuners in TVs?
  • A varactor
  • B Schottky
  • C LED
  • D Gunn
Answer: Option A
Q18
A laser diode normally emits
  • A coherent light.
  • B monochromatic light.
  • C coherent and monochromatic light.
  • D neither coherent nor monochromatic light.
Answer: Option C
Q19
A varactor is a pn junction diode that always operates in ________-bias and is doped to ________ the inherent capacitance of the depletion region.
  • A forward, maximize
  • B reverse, maximize
  • C reverse, minimize
  • D forward, minimize
Answer: Option B

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