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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.
a) A circuit has a voltage of 15V and a current of 2A. the phase angle is 45 degree. Verify the true power of the circuit? (Calculate apparent and true power) b) Verify the appare
Define Frozen Solid (Moscow Phys-Tech)? Evaluation how long it will take for a small pond of average depth D=0.5 m to freeze entirely in a very cold winter, when the
A customer requested the design of a Heat Exchanger and provided the following information to the Engineering Department. In his factory, as part of the process upgrade, there is a
How many dimension follow a atomic particle?
Q. What instrument is utilized to measure volume? Answer:- Liquid volume is measured with graduated cylinders, beakers, measuring cups, spoons and the like. For regular ob
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Semiconductor is solid material whose electrical conductivity at room temperature lies between conductivity of a conductor and that of an insulator. At high temperatures its conduc
retardation?
Noise: An undesirable and unpleasant sound that makes harmful effects on our auditory system is known as noise.
What are the advantages of fibre optic communication? Advantages of fibre optic communication are as follows: a. Enormous band width Coaxial cable transmission of 500 M
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