Output Devices Multiple Choice Questions (MCQ) PDF Download

MCQ 1: LED starts to conduct when voltage is about

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

MCQ 2: Op-amp can provide maximum output current of

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

MCQ 3: A device used to avoid the relay destroying the op-amp is

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

MCQ 4: To limit current in LED, resistor should be connected in

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

MCQ 5: 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. 500 Ω
2. 400 Ω
3. 300 Ω
4. 200 Ω