Question

1. what is the schematic symbol shown below? a. laser b. triac c. photo - coupler. d. photo - scr

Explanation:

The symbol shown has a light - emitting feature (the lightning - bolt like symbol near the device) and is a type of semiconductor device. A photo - SCR (Silicon Controlled Rectifier) has a light - sensitive gate. The given symbol represents a photo - SCR as it is designed to be triggered by light. A laser symbol is different, a triac is a different type of thyristor for AC control and a photo - coupler has a different structure and symbol representation.

Answer:

D. photo - SCR