Opto Electronics MCQ with Answers

Opto Electronics MCQ with Answers

21) What is the main application of photo resistor?

Answer is:

Controls of street lighting systems

What is the main application of photo resistor?

22) Which purpose the cadmium sulfide cells (CDS cells) are used?

Answer is:

Light dependent resistor

23) How the light sensitive photo transistor enclosed inside a tight package is activated?

Answer is:

By IR light produced inside the package

24) Which measuring instrument is used to check the working condition of a photo resistor (LDR)?

Answer is:

Ohmmeter

Which measuring instrument is used to check the working condition of a photo resistor (LDR)?

25) Which electronic device inversely changes its resistance with the amount of light falling on it?

Answer is:

Photo resistors

Which electronic device inversely changes its resistance with the amount of light falling on it?