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  Unit - 1: Conducting Materials1.1 - 1.42 1.1Introduction1.11.1.1Classical free electron theory1.11.1.2Quantum free electron theory1.11.1.3Zone theory (or) Band theory1.21.2Assumptions (postulates) of Classical free electron theory1.21.3Basic terms involved in the free electron theory1.31.4Success or uses of Classical free electron theory1.41.5Drawbacks of Classical free electron theory1.41.6Expression for Electrical Conductivity (  )1.51.6.1Expression for electrical conductivity1.51.6.2Correct expression for electrical conductivity of conductors1.71.7Thermal conductivity (K)1.71.7.1Expression for thermal conductivity (K) of an electron1.71.8Wiedemann-franz Law1.101.8.1Derivation1.101.8.2By Quantum theory1.111.9Quantum Free Electron Theory1.121.9.1Assumptions (Postulates) of Quantum free electron theory1.131.9.2Advantages of Quantum free electron theory1.131.9.3Drawbacks of Quantum free electron theory1.131.10Fermi – Dirac Distribution Function1.141.10.1 Effect of Temperature on Fermi Function1.141.10.2 Fermi level, Fermi Energy and their importance1.151.11Density of States1.161.11.1Carrier concentration in metals1.191.11.2 Average energy of an electron at 0K1.201.12 Work Function1.211.12.1 Explanation1.21Solved Problems1.23Short Questions with Answers1.35Part – B Questions1.41Assignment Problems1.42 Contents Visit : Civildatas.blogspot.inVisit : Civildatas.blogspot.in  Unit - 2: Semiconducting Materials2.1 - 2.54 2.1Introduction2.12.1.1Properties of semiconductor2.22.2Classification of Semiconductors2.22.2.1Intrinsic semiconductors2.32.2.2Compound Semiconductors2.32.2.3Difference between N-type and P-type semiconductor2.32.2.4Difference between Elemental and Compound Semiconductors2.42.3Classification of Conductors, Insulatorsand Semiconductors Based on Band Theory2.42.3.1Conductors2.42.3.2Insulators2.52.3.3Semiconductors2.62.3.4Mobility and Conductivity in Semiconductors2.62.4Carrier Concentration in Intrinsic Semi-conductors2.72.4.1Density of electrons in conduction band2.82.4.2Density of Holes in Valence band2.102.4.3Intrinsic Carrier Concentration2.132.5Fermi level and variation of fermi levelwith temperature in an intrinsic semiconductor2.142.6Density of Electrons and Holes In Terms of E g 2.152.7Variation of Fermi level in Intrinsic semiconductor2.162.8Electrical Conductivity in Intrinsic Semi-conductor2.172.9Determination of Band Gap Energy of a Semiconductor2.182.10Extrinsic Semiconductor2.192.10.1 N-type Semiconductor (Donor impurity)2.202.10.2 P – type Semiconductor (Acceptor Impurities)2.212.11 Charge Densities in a Semiconductor2.222.12 Carrier Concentration in P-type Semi-conductor2.232.12.1 Expression for the density of holes in valence band in termsof N A 2.252.13 Carrier Concentration in N-type Semi Conductor2.262.13.1 Expression for the density of electrons inconduction band in terms of N D 2.282.14 Variation of Fermi Level with Temperature andConcentration of Impurities in P-type Semiconductor2.30 Visit : Civildatas.blogspot.inVisit : Civildatas.blogspot.in  2.15 Variation of Fermi Level with Temperature andConcentration of Impurities in N-type Semiconductor2.312.16 Hall Effect2.312.16.1 Hall Effect2.322.16.2 Hall Effect in n –type Semiconductor2.322.16.3 Hall Effect in p-type Semiconductor2.342.16.4 Hall Coefficient Interms of Hall Voltage2.352.16.5 Experimental Determination of Hall Effect2.362.16.6 Application of Hall Effect2.37Solved Problems2.38Short Questions with Answer2.46Part - B Questions2.53Assignment Problems2.54 Unit - 3: Magnetic and Superconducting Materials3.1 - 3.76 3.1Introduction3.13.1.1Basic Definitions3.13.2Origin of Magnetic Moments3.43.3Classification of Magnetic Materials3.63.3.1Diamagnetic materials3.73.3.2Paramagnetic Materials3.83.3.3Ferromagnetic materials3.93.3.4Dia, Para and Ferro magnetic materials – Comparison3.113.4Domain Theory of Ferromagnetism3.123.4.1Energies involved in the domain growth (or)Origin of Domain theory of Ferromagnetism3.133.5Antiferromagnetic Materials3.163.6Ferrimagnetic Materials3.173.7Hysteresis3.173.7.1Explanation of hysteresis on the basis of Domains3.193.8Hard and Soft Magentic Material3.203.8.1Hard Magnetic Materials3.203.8.2Soft Magnetic Materials3.223.8.3Difference between Hard and Soft magnetic materials3.23 Visit : Civildatas.blogspot.inVisit : Civildatas.blogspot.in  3.9Ferrites3.233.9.1 Properties3.233.9.2 Structures of Ferrites3.243.9.3 Regular spinal3.243.9.4 Inverse spinal3.253.9.5Types of interaction present in the ferrites3.253.9.6 Properties of ferromagnetic materials3.263.9.7 Application of Ferrites3.263.10Magnetic Recording and Readout Memory3.273.10.1 Magnetic parameters for Recording3.273.10.2Storage of Magnetic Data3.283.10.3 Magnetic Tape3.293.10.4 Magnetic Disc Drivers3.293.10.5 Floppy Disk3.313.10.6 Magnetic bubble Materials3.32 SUPER CONDUCTORS 3.11Introduction to Superconductivity3.343.12Properties of Superconductors3.353.12.1Critical magnetic field (Magnetic Property)3.353.12.2Diamagnetic property (Meissener effect)3.363.12.3SQUID (Superconducting Quantum Interference Device)3.373.12.4 Effect of heavy Current3.383.12.5 Persistence of Current3.383.12.6 Effect of pressure3.383.12.7Isotope effect3.393.12.8General properties3.393.13Types of Super Conductors3.393.13.1 Difference between Type I and II superconductors3.423.13.2 Difference between High T C  and Low T C  superconductors3.433.14 High Temperature (High-T c ) Superconductors3.433.15 Bcs Theory of Superconductivity3.443.16 Applications of Superconductors3.47 Visit : Civildatas.blogspot.inVisit : Civildatas.blogspot.in
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