Optical Diodes MCQs Quiz Online PDF Download

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Electronic devices practice test MCQ: early leds were built up of semiconductor with options si, sio, gaas and be with online interview questions and answers for pre-employment exams of electronics and communication engineering jobs placements. Free study guide is for online learning optical diodes quiz with MCQs to practice test questions with answers.

MCQs on Optical Diodes Quiz PDF Download

MCQ: Early LEDs were built up of semiconductor

  1. Si
  2. SiO
  3. GaAs
  4. Be

C

MCQ: GaP were used as light emitter ro achie Ve pale

  1. red light
  2. yellow light
  3. green light
  4. blue light

C

MCQ: GaAs LED emits

  1. microwaves
  2. IR radiations
  3. Ultra Violet
  4. X-rays

B

MCQ: Light color and Visibility is determined in LED by

  1. microwave
  2. wavelength
  3. spectrum
  4. capacitance

B

MCQ: A common display device of LED is

  1. se Ven segment display
  2. red light pointer
  3. LED T V
  4. multilight pointer

A