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It is suitable for growing semi-conductively alloys like gallium arsenide. A typical arrangement is furnished with an induction heater that provides a controllable temperature gradient along the furnace. The boar with the material is placed in sealed tube and moved from high temperature zone to low temperature zone. The chemical purified gallium arsenide material is melted at about 1250 degree centigrade in high temperature zone and slowly passes into lower temperature zone where it solidified from one end to about 620 degree centigrade. The temperature is chosen so that a small amount of arsenide always kept in this zone will provide an arsenic atmosphere in which crystallisation of gallium arsenide occurs.
V-I Characteristics of Constant Current Source A source which has high internal resistance (or impedance) as compared to load resistance (or impedance) i
Davisson and Germer scattered electrons from a crystal of nickel. The scattered electrons formed a strong diffraction pattern. What important conclusion was drawn from this experi
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What are the steps to the scientific notation? To write in scientific notation, you should first move the decimal point of the number to where the number is among 1 and 9. For
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As a pendulum is raised to higher altitudes, its period: a) Increases b) Decreases c) Remains the same d) Decreases, and then remains the same Ans: When
Write the mathematical relation for the resistivity of a material in terms of relaxation time, number density and mass and charge of charge carriers in it. Describe, using this rel
what is deforming force
does lights of different wavelengths help us to see different colour
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