Question

Q11. Which of the following is
true about optocouplers
2 points
Optocoupler can be used in both input
and output circuitry
Optocoupler acts as an input device
only
Optocoupler acts as an output device
only
None of these

Answer 1

Answer:

Optocoupler can be used in both input and output circuitry.

Explanation:

Optocouplers, also known as Opto-isolators is a semiconductor device used for transmitting electrical signals between two isolated circuits. There are two parts in an optocoupler:

• An LED that emits infrared light
• A photosensitive device which detects light from LED

The input circuit takes the incoming signal whether it is AC or DC and uses the signal to turn on the LED.

The photosensor is the output circuit that detects the light and depending on the type of output circuit, the output will be AC or DC.

Thus, we can see that an optocoupler is used in both input and output circuitry.