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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.
Chemical formula for calcium pyrophosphate is ca 2, P 2 O 1. The formula for ferric pyrophosphate will be: (1) Fe 3 (P 2 O 1 ) 3
Characteristics?
structure of Bicyclo(3.3.1)non-1-ene
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an activity on any two laws of chemical combination
What is condensation polymer?
how analysis of iodine value
Cycloalkene - Hydrocarbon Carbocyclic compounds along with double bonds in the ring are known as cycloalkenes. Few common cycloalkenes are Cycloalkenes can be simply ac
Mining of petroleum and Petroleum refining (1) Mining of petroleum: Petroleum deposits takes place at varying depth at different places ranging from 500 to 15000 feet. This is
On the basis of electrical conductivity the solids can be broadly classified into three types: (a) Metals (b) Insulators (c) Semiconductors Electrical conductiv
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