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GALLIUM PHOSPIDE: It has band gap of 2.3ev. it can be used for light emitting diodes which can emit green or red light. The red light is obtained with zinc or cadmium oxide doping.
SELENIUM: It is found in crystalline and non-crystalline form. It is used as rectifier material for photo voltaic cells and for xerographic printing. Selenium films are used as photo electric light meters. Its melting point is 2200C.
LEAD: it is soft heavy and bluish gray metal. It is highly resistant to many chemical actions but can corrode by nitric acid, lime and rotten organic substances. Lead and its compounds are toxic. It is mechanically weak it cannot withstand vibrations at high temperatures. It alloys easily with Tin and zinc and forms many commercial alloys, including solders and bearing metals.
Illustrate the term temperature sensor? Temperature sensor: Bimetal coated onto the tip of fiber. When temperature increases the bimetal bends because of difference within t
What is a digital signal? Describe the function of modem in data communication. Write two benefits of digital communication
type of diodes
who present first three laws of motions
in some case we take y=-g but in some case we take y=g... why???
a car of mass 800kg is pulling a trailer 300kg where sin a=1|200.Resistance to motion(apart from gravity) is 1.5N per kg of mad for each vehicle.calculate the pulls of the engine a
Characteristics of a Transmitted Pulse The below animation depicts the boundary behavior of a pulse that is moving along a less dense incident and medium towards that is approa
Suppose you sound a 1056-Hz tuning fork at the same time you strike a note on the piano and hear 2 beats/second. You tighten the piano string very slightly and now hear 3 beats/s
4 dimenestional motion examples
a) Sketch an IV characteristic of a photodiode, showing how the curve shifts as a result of the illumination intensity incident on the device being varied. b) Indicate on the c
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