Photoelectric Transducers MCQ

Test your knowledge with important Photoelectric Transducers MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30+ more Photoelectric Transducers MCQs on Bissoy. Bissoy App

• Thermister is used to measure ____________
  ক

  temperature

  খ

  pressure

  গ

  height

  ঘ

  displacement
• Cesium-silver oxide cells are sensitive to the near infrared wavelengths.
  ক

  True

  খ

  False
• Which of the following is a photoemissive cell?
  ক

  photomultiplier tubes

  খ

  barrier layer cell

  গ

  galvanic cell

  ঘ

  rochell-salt cell
• The instruments which give a direct reading of the temperature at the thermistor position are known as _________
  ক

  thermistor

  খ

  telethermometers

  গ

  rtd

  ঘ

  tempothermometer
• Photovoltaic cells need an external electrical supply to function.
  ক

  True

  খ

  False
• Photo-diodes work in _________
  ক

  forward biased

  খ

  reverse biased

  গ

  independent of forward and reverse biasing

  ঘ

  any configuration
• Which of the following is not a photoemissive cell?
  ক

  high vacuum photocells

  খ

  barrier layer cell

  গ

  gas-filled photocell

  ঘ

  photomultiplier tubes
• Selenium cells are sensitive to almost the entire range of wavelengths of the spectrum.
  ক

  True

  খ

  False
• Which of the following material is used to build photovoltaic cells?
  ক

  selenium

  খ

  celenuim

  গ

  silicon

  ঘ

  iron
• What is the principle behind photoelectric transducers?
  ক

  conversion of wind energy to electrical energy

  খ

  conversion of light energy to electrical energy

  গ

  conversion of mechanical energy to electrical energy

  ঘ

  conversion of electrical energy to light energy
• Reverse leakage current in a transistor _______
  ক

  is affected by light

  খ

  is not affected by light

  গ

  increases with a decrease in pressure

  ঘ

  decreases with increase in temperature
• Response time for gas-filled phototubes is _______
  ক

  zero

  খ

  intermediate

  গ

  fast

  ঘ

  slow
• Optocoupler consists of a phototransistor and a led.
  ক

  True

  খ

  False
• When an open circuited pn junction is illuminated then _________________
  ক

  resistance increases

  খ

  there is no effect

  গ

  electron hole pairs are formed

  ঘ

  capacitance increases
• Photoconductors are made of _______
  ক

  thick layer of semiconductor

  খ

  thin layer of semiconductor

  গ

  capacitive substrate

  ঘ

  inductive substrate
• Phototubes are very quick in response to light.
  ক

  True

  খ

  False
• Commonly used photoemissive material is _______
  ক

  gold

  খ

  opium

  গ

  tellurium

  ঘ

  cesium-antimony
• Photoconductive transducers produce output ________
  ক

  due to change in inductance

  খ

  due to change in light

  গ

  due to change in resistance

  ঘ

  due to change in temperature
• Photoelectric transducers consist of _______
  ক

  1 transducer

  খ

  3 transducers

  গ

  5 transducers

  ঘ

  10 transducers
• Optical radiations involve _________
  ক

  optoelectric devices

  খ

  biological devices

  গ

  mechanical devices

  ঘ

  chemical devices