Output Devices MCQs Quiz Online PDF Download

Learn output devices MCQs, A level physics test for online courses learning and test prep to practice. Electronics quiz has multiple choice questions (MCQ), output devices quiz questions and answers to learn for high school teaching credential assessment.

GCE physics practice test MCQ on led starts to conduct when voltage is about with options 1 v , 4 v, 3 v and 2 v problem solving skills for viva, competitive exam prep, interview questions with answer key. 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


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