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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.
Sample Problem: Consider laminar flow through two infinitely wide parallel plates spaced D apart from one another. What is the thermal entry length?
Semi Conductors: Substance which are neither good Conductor, like metals nor very bad conductors like non metals are known as Semi conductors Examples of such substances are si
what are the various types of tops ?
initial position time the vibration mean time time period of the bob t time
draw and explain the internal combustion engine as it relates to carnot cycle and otto cycle
Illustrates the Electric Motors? An electric motor is basically the reverse of an electric generator. It is a machine which turns electrical energy - AC from the wall or dire
Introduction and Definition: The force between two particles was studied by Coulomb in 1785. He stated that the force of attraction or repulsion between two charged particle
Making a simple refracting telescope To make a simple telescope, two cardboard tubes will be needed, one fitting inside the other. It is not possible to make a satisfactory t
Define energy
The least count of the stopwatch is 0.1 second because in stopwatch we can measure milliseconds also...
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