This article explains What is a Photodiode, How it works and how to use them in a circuit. Note: Reverse current flows through the photodiode when it is sensing light. This set of multiple-choice questions includes the collection of solved MCQ on the Routing algorithm in computer networks. It has wide range of applications like Remote control, alarms, sensory applications and so on. 20) The Widal test is used for the detection of Salmonella typhi and other subspecies. 3. The colour of emitted light from LED depends on. Sometimes it is also called a photo-detector, a light detector, and photo-sensor. b. This test is based on the principle where? A. A photodiode is a PN-junction diode that consumes light energy to produce an electric current. This is the Multiple Choice Questions (MCQs) in Chapter 20: How Diodes Are Used from the book Teach Yourself Electricity and Electronics, 5th edition by Stan Gibilisco. If photons excite carriers in a reverse-biased pn junction, a very small current proportional to the light –Phototransistors are photodiodes with some internal amplification. 1. Multiple Choice Questions and Answers on Semiconductor Diode. when used as a detector of optical signals is operated under reverse bias. Multiple Choice Questions and Answers By Sasmita January 9, 2020. a) the antigens are detected using the neutralization assay b) the antigen combines with its soluble antibody and form a lattice and develops a visible precipitate If you are looking for a reviewer in Electronics Engineering this will definitely help you before taking the Board Exam. In addition to reading the questions and answers on my site, I would suggest you to check the following, on amazon, as well: Construction of LED, that is physical dimensions B. The Following Section consists Multiple Choice Questions on Diodes and Applications. photodiode. Photodiodes are constructed like any other conventional junction diodes. Take the Quiz and improve your overall Engineering. Here you will find multiple-choice questions on alternate and adaptive routing algorithms, Enhanced Interior Gateway Routing Protocol(EIGRP), unicast routing, OSPF, BGP and EIGRP along with the example of a link-state routing protocol. Find the distance in yards to an object if the display of a radar signal measures 4.4 microseconds. 328 . Start Practice Exam Test Questions. –Photodiodes are designed to detect photons and can be used in circuits to sense light. 380 . When light is incident on a Photodiode, the electrons and holes are separated and will allow the junction to conduct. A typical photo diode is shown below. a. c. 722 . The opaque coating used in signal and rectifier diodes is absent in photo diodes. give reason 26. 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