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4. (a) Explain the concept of (i) intrinsic, (ii) n-type, and (iii) p-type semiconductors with the aid of bond diagrams and band diagrams.
(b) What is a hole? Using a mathematical derivation to show that the holes behave like positive charges.
(c) Explain with the aid of Fermi-Dirac distribution function that at 0° K, all the energy states in the valence band of silicon are filled and all the energy states in the conduction band are empty.
(d) Why it is necessary to use effective mass instead of real mass for electrons in the analysis of semiconductor materials and mention why different effective masses are to be used for different types of semiconductors,
(e) Explain (a) bonding orbital and (b) anti-bonding orbital.
What will happen if you mix nitrogen and hydrogen gas at room temperature? Explain your reasoning. Calculate the mole fraction of NH 3 that would form theoretically at 298.15
Reaction involving cleavage of with removal of 'H' as proton Alcohols are stronger acids as compared to terminal acetylene but are not acidic enough to react along with aqueous
what is the chemistry behind the reactions of confirmatory test of sulphide radical of dilute acid group.
If lipids are mixed with water, what aggregates can they form? Explain two characteristic superstructures which are commonly found in biological systems, containing our food. How i
Which of the following reduces the activation energy of a chemical reaction?
which type of nutrition does yeast have?
variation of cnductivigy with temperature
Which electronic configuration is not observing the ( n+ 1) rule: (1) 1s 2 , 2s 2 , 2p 6 , 3s 2 , 3p 6 , 3d 1 , 4s 2 (2) 1s 2, sp 2 , sp 6 , 3s 2 , 3p 6 , 3
Q. Ash content of a foodstuff? Ash content of a foodstuff represents inorganic residue remaining after destruction of organic matter. It may not be the exact measure of the tot
4Be9+2He4-6C12+0n1
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