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Lecture 5 : Band theory of metals ; Magnetic properties

  • Chapter -1 The Solid State Assignments 1

    Explain why does conductivity of germanium crystals increase on doping
    with galium.

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  • Chapter -1 The Solid State Assignments 2

    Why is FeO (s) not formed in stoichiometric composition?

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  • Chapter -1 The Solid State Assignments 3

    What do you mean by paramagnetic substance?

     

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  • Chapter -1 The Solid State Assignments 4

    What  type  of   substances  would  make  better   permanent  magnets,  ferromagnetic  or ferromagnetic, why?

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  • Chapter -1 The Solid State Assignments 5

    Explain the following with suitable examples:

    (i) Ferromagnetism

    (ii)Paramagnetism

    (iii)Ferrimagnetism

    (iv)Antiferromagnetism

    (v)12-16 and 13-15 group compounds.

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  • Chapter -1 The Solid State Assignments 6

    Explain the following terms with suitable examples:

    (i) Schottky defect

    (ii) Frenkel defect

    (iii) Interstitials and

    (iv) F-centres

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  • Chapter -1 The Solid State Assignments 7

     

    Calculate the efficiency of packing in case of a metal crystal for

    (i) simple cubic

    (ii) body-centred cubic

    (iii) face-centred cubic (with the assumptions that atoms are touching each other).

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  • Chapter -1 The Solid State Assignments 8

     

    How will you distinguish between the following pairs of terms:

    (i) Hexagonal close-packing and cubic close-packing?

    (ii) Crystal lattice and unit cell?

    (iii) Tetrahedral void and octahedral void?

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    • Description:-

    Lecture 5 :
    Today, we will discuss the last two topics of this chapter, i.e; Band theory of metals ; Magnetic properties from    Chapter -1 The Solid State
    OBJECTIVES:
    1: Know every about solid state through these topics i.e; Band theory of metals ; Magnetic properties
    Important Tip:
     This lecture about Chapter -1 The Solid State is base for the further chapters. These topics help in many ways as to understand the and how we can use them. It help you in further studies also.Please go through the topic, their notes. Properly do the assignments, watch videos of the concerned topics. If you any doubt about any topic/point please submit it in the discussion section... it will be answered as soon as possible.
    After all of this... when you fell confident about the particular topic/chapter then take the quiz.

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