A. IR sensors<\/strong><\/p>\nIR sensors are used to detect optical signals. They are a type of sensor that can detect infrared light, which is a type of light that is invisible to the human eye. IR sensors are used in a variety of applications, including security systems, remote controls, and motion detectors.<\/p>\n
Photodiodes are a type of semiconductor device that converts light into an electrical signal. They are used in a variety of applications, including solar cells, photodetectors, and light-emitting diodes (LEDs).<\/p>\n
Zener diodes are a type of semiconductor device that is used to regulate voltage. They are used in a variety of applications, including power supplies, voltage regulators, and surge protectors.<\/p>\n
Transistors are a type of semiconductor device that is used to amplify and switch electronic signals. They are used in a variety of applications, including computers, cell phones, and televisions.<\/p>\n
In conclusion, the correct answer is: A. IR sensors<\/strong>. IR sensors are used to detect optical signals. They are a type of sensor that can detect infrared light, which is a type of light that is invisible to the human eye. IR sensors are used in a variety of applications, including security systems, remote controls, and motion detectors.<\/p>\n","protected":false},"excerpt":{"rendered":"[amp_mcq option1=”IR sensors” option2=”Photodiodes” option3=”Zener diodes” option4=”Transistors” correct=”option1″]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[684],"tags":[],"class_list":["post-54887","post","type-post","status-publish","format-standard","hentry","category-optical-communication","no-featured-image-padding"],"yoast_head":"\n
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