Optical Diodes MCQs Test Online PDF Download

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MCQ on Optical Diodes Quiz PDF Download

MCQ: Early LEDs were built up of semiconductor

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


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

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


MCQ: GaAs LED emits

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


MCQ: Light color and Visibility is determined in LED by

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


MCQ: A common display device of LED is

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