Output Devices MCQs Quiz Online PDF Download

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GCE physics practice test MCQ: led starts to conduct when voltage is about with options 1 v , 4 v, 3 v and 2 v for online interview questions and answers for teaching assistant jobs, teacher jobs and tutoring jobs. Free study guide is for online learning output devices quiz with MCQs to practice test questions with answers.

MCQs on Output Devices Quiz PDF Download

MCQ: LED starts to conduct when voltage is about

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

D

MCQ: Op-amp can provide maximum output current of

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

A

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

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

C

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

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

B

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

A