Output Devices MCQs Test Online PDF Book Download

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MCQ on Output DevicesQuiz Book Download

MCQ: LED starts to conduct when voltage is about

  1. 1 V
  2. 4 V
  3. 3 V
  4. 2 V


MCQ: Op-amp can provide maximum output current of

  1. 25 mA
  2. 30 mA
  3. 35 mA
  4. 40 mA


MCQ: A device used to avoid relay destroying op-amp is

  1. diode
  2. LED
  3. reverse bias diode
  4. forward biased diode


MCQ: To limit current in LED, resistor should be connected in

  1. parallel
  2. series
  3. evacuated flask
  4. ionized tube


MCQ: If current of 20 mA is passing through op-amp and voltage drop across series resistor is 10 V then value of resistance is

  1. 500Ω
  2. 400Ω
  3. 300Ω
  4. 200Ω