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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.
Q. What is the density of energy states in metals? Obtain an expression for the density of states for free electron gas in metals. Ans. Density of energy state is define
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Charging: During charging the device is linked across a source of D.C. supply having a voltage of about 3 volts. When the circuit is switched on the current flows inside the cell
plz derive a equation to magnetic force between short magnetic dipoles at distance apart?
Define Eddy Currents ? If you try to pull a solid piece of some metals (good electrical conductors) quickly between the poles of a strong magnet, you will feel a force pushing
Explain Force Diagrams and Addition of Forces If you have a piano and your friend offers to help move it, would it be more helpful for him to push with 100 Newtons on the
A point source of light is taken at the bottom of a tank containing water (n for water = 4/3) to a depth of 0.5 m. Determine the area of the circular patch through which light from
What is Modern view Modern view : It objects tend to remain in their initial state; force is needed to change motion. Resistance to alters in motion is known as inertia.
How we can increase the data input from 4 to 8 of multipluxer and data outputs from 4to 8 of demultipluxer? Properly draw circuit diagram
describe the construction and working of a Nicol prism.discuss how you obtain a plane polarised beam with it?
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