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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.
copper reacts with oxygen to form two oxides es x and y on analysis 1.535 g of x yielded 1.365 g of copper and 1.450 g of y yielded 1.160 g of copper(1) determine the chemical for
Q. Definition of Avogadros Hypothesis? Ans. Equal volumes of different gases at the same temperature and pressure contain the same number of molecules. At a given temperatu
fundamentals of analytical chemistry 8th edition
what are the subatomic particles present in an atom?
What are the points to be taken into account to compare the enol %? Ans) Different propositional proof system for theorem proving in propositional logic, like sequent calculus,
Q. How to change in Oxidation Number in Redox Reactions? Ans. In reduction-oxidation, or redox, reactions, atoms undergo changes in their oxidation numbers. Consider th
structure and uses
Energy of electron of hydrogen atom in second Bohr orbit is: (1)-5.44x10 -19 j (2)- 5.44x10 -19 kj (3)-5.44x10 -19 cal
which solution is formed when iodine solution ,copper sulphate and caustic soda are mixed?
Q1: The complexes of Fe +2 with 1, 10- phenanthroline has a molar absorptivity of about 11,000 L/mol cm in water at 510 nm. A 20 ml water sample thought to contain Fe +2 is mix
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