The colour of emitted light from LED depends on. It has wide range of applications like Remote control, alarms, sensory applications and so on. Light Emitting Diode or LED objective questions and answers. when used as a detector of optical signals is operated under reverse bias. 380 . A. If you are looking for a reviewer in Electronics Engineering this will definitely help you before taking the Board Exam. This set of multiple-choice questions includes the collection of solved MCQ on the Routing algorithm in computer networks. Sometimes it is also called a photo-detector, a light detector, and photo-sensor. The Following Section consists Multiple Choice Questions on Diodes and Applications. –Phototransistors are photodiodes with some internal amplification. 20) The Widal test is used for the detection of Salmonella typhi and other subspecies. Find the distance in yards to an object if the display of a radar signal measures 4.4 microseconds. This test is based on the principle where? d. 656 Construction of LED, that is physical dimensions B. If photons excite carriers in a reverse-biased pn junction, a very small current proportional to the light A typical photo diode is shown below. Photodiodes are constructed like any other conventional junction diodes. Number of available carriers C. Type of semiconductor material used D. Number of recombinations taking place Multiple Choice Questions and Answers on Semiconductor Diode. 1. 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 give reason Note: Reverse current flows through the photodiode when it is sensing light. Photodiodes are one of the popular components used to sense incident light in electronic circuits. In addition to reading the questions and answers on my site, I would suggest you to check the following, on amazon, as well: photodiode. Take the Quiz and improve your overall Engineering. When light is incident on a Photodiode, the electrons and holes are separated and will allow the junction to conduct. Multiple Choice Questions and Answers By Sasmita January 9, 2020. –Photodiodes are designed to detect photons and can be used in circuits to sense light. Start Practice Exam Test Questions. a. A photodiode is a PN-junction diode that consumes light energy to produce an electric current. 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. Multiple Choice Questions and Answers on Semiconductor Diode. The opaque coating used in signal and rectifier diodes is absent in photo diodes. 328 . c. 722 . 26. 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