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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.
Defination of dry test for basic radicle
Isomerism - Organic Chemistry Organic substance comprising the same molecular reaction but differing from each other at least in some physical or chemical properties or both ar
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Analysis show that nickel oxide has formulla ni .98 O 1.00 what fraction of the of nickel exist as ni+3 & Ni +2 Ans) ni+2=95.91 and ni+3=4.09
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A single covalent bond is build when two atoms share a pair of electrons. Triple and double bonds can be formed when two or three such pairs are shared. A Lewis structure is a repr
get calcium EDTA from disodium EDTA and calcium which in complexomteric reaction. how mechanism of making ??
The postulate of Bohr theory that electrons jump from one orbit to the other, rather than flow is according to : (1) The quantisation concept (2) The wave nature of elect
Applications of flame photometry: A few common applications of flame photometry are given below. Flame photometry could be used to detect the presence of the elements o
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