Engineering Physics-II
- Introduction to Crystallography
- Introduction to Crystallography
- Miller Indicmes
- Miller Indices
- Lattice Parameters
- Lattice Parameters
- Bravais lattice
- Bravais lattice
- Important features of Miller indices
- Important features of Miller indices
- Space lattice,unit cell and basics
- Space lattice,unit cell and basics
- Nearest Neighbouring Distance
- Nearest neighbouring distance
- FCC BCC and HCP
- FCC BCC and HCP
- Introduction and Bragg's Law
- Introduction and Bragg's Law
- X - ray Diffraction method - Laue method
- X - ray Diffraction method - Laue method
- X - ray diffraction - Powder method
- X - ray diffraction-Powder method
- Defects in crystals
- Defects in crystals
- Line Defects
- Line Defects
- Burgers vector
- Burgers vector
- Stacking faults
- Stacking faults
- Point Defects
- Point Defects
- Introduction to classical theory of free electrons
- Introduction to classical theory of free electrons
- Kronig- penny model
- Kronig- penny model
- Origin of Energy Bands in Solids
- Origin of Energy Bands in Solids
- Classification of Solids
- Classification of Solids
- Long Answer Questions
- Short Answer Questions
- Multiple Choice Questions
- Introduction to Magnetic Properties
- Introduction to Magnetic Properties
- Origin of Magnetic Moment
- Origin of Magnetic Moment
- Classification of Magnetism Materials
- Classification of Magnetism Materials
- Hysteresis Curve Based on Domain Theory
- Hysteresis Curve Based on Domain Theory
- Soft and Hard Magnetic Materials
- Soft and Hard Magnetic Materials
- Anti Ferro and Ferri Magnetic Materials
- Anti Ferro and Ferri Magnetic Materials
- Superconductivity Phenomena
- Superconductivity Phenomena
- Meisnmer Effect
- Meisnmer Effect
- Applications of Super Conductivity
- Applications of Super Conductivity
- Structure of Barium Titanate
- Structure of Barium Titanate
- Long Answer Question
- Short Answer Question
- Mcqs
- Introduction to Semi Conductor Physics
- Introduction to Semi Conductor Physics
- Calculation of Carrier Concentration in Intrinsic Semi Conductors
- Calculation of Carrier Concentration in Extrinsic Semi Conductors
- Calculation of Carrier Concentration in Intrinsic and Extrinsic Semi Conductors
- Direct and Indirect Band Gap Conductors
- Direct and Indirect Band Gap Conductors
- Formation of P-N Junction Diode
- Formation of P-N Junction Diode
- Energy Band Diagram of P-N Junction Diode
- Energy Band Diagram of P-N Junction Diode
- Solar Cell I-V Characteristics and Applications
- Solar Cell I-V Characteristics and Applications
- Mcqs
- Introduction to Dielectric Properties
- Introduction to Dielectric Properties
- Basic Definitions in Dielectric Properties
- Basic Definitions in Dielectric Properties
- Polarization
- Polarization
- Definition Of Important Terminology
- Definition Of Important Terminology
- Internal Field
- Internal Field
- Clausius-Mossotti Relation
- Clausius-Mossotti Relation
- Ferro Piezo and Pyro Electricity
- Ferro Peizo and Pyro Electricity
- Long Answer Question
- Short Answer Question
- Mcqs
- Introduction and Origin of Nano Science
- Introduction and Origin of Nano Science
- Nano Meter Scale Occurrence and Importance of Nano Materials
- Nano Meter Scale Occurrence and Importance of Nano Materials
- Factors that Differentiate Nano Materials from Bulk Materials
- Factors that Differentiate Nano Materials from Bulk Materials
- Random Molecular Motion and Dominance of Electro Motive Force
- Random Molecular Motion and Dominance of Electro Motive Force
- Production of Nano Materials - Bottom Up Fabrication
- Production of Nano Materials - Bottom Up Fabrication
- Production of Nano Materials - Top up Fabrication
- Production of Nano Materilas - Top up Fabrication
- Long Answer Question
- Short Answer Question
- Mcqs
- Internal Field
Introduction to Crystallography
Introduction to Crystallography
- Crystallography the study of crystals.
- Solids are classified into two types they are crystalline solid and non-crystalline (or) amorphous
Crystalline solids:
- Atoms are arranged in a periodic manner in all the three (dimension) directions.
- It may be a single crystal or poly crystal as physical property varies with direction
- They are also called as anisotropic substances
- They are made up of metallic or non-metallic crystals
- Metallic: Cu, Al, Ag, Ab, Mn etc..
Non-metallic: Plastic ,Polymers etc……
Non-crystalline solids:
- The arrangement of atoms is random, they are called as amorphous solids.
- As they have no directional properties they are called as isotropic substances.
- They do not possess any regular shape
- They have night melting points
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Q1 : Define Chemical bond ?
A chemical bond is defined as inter-atomic or inter molecular, inter-ionic force of attraction which holds the atoms together.
Q2 : What are Primary bonds ?
Primary bonds are the strongest bonds which hold atoms together.
The three types of primary bonds are,
• Ionic bond
• Covalent bond
• Metallic bond
Q3 : Define Ionic Bond ?
Ionic Bond: This bond is the simplest type of chemical bond called ‘Hetero polar Bond’. Ionic bonds are mostly insulating in character. These are not pure elements, but they are compounds. Ex: NaCl, KCl, KBR etc .
Q4 : Define Covalent bond ?
Covalent bond is formed by the sharing of electrons between the homo atoms or hetero atoms.
Q5 : Define Metallic bond ?
Bonding within metals due to the electrical attraction of positively charges metal ions for mobile electrons that belong to the crystal as a whole.
Q6 : Define Cohesive energy ?
It is the energy that must be supplied to the solid to separate its constituents into neutral free atoms at rest and at infinite separation with the same electronic configuration.
Q7 : Define Crystallography ?
The branch of science which deals with the study of crystals and their properties by using X-ray , electron and neutron diffraction methods in crystallography. It is mainly used to determine the internal arrangement of atoms in crystals, bonding and their strengths .
Q8 : Define crystalline solids and Amorphous solids ?
1) If the atoms or molecules in a solid are periodically at regular intervals of distances in 3 dimensions then such a solids are known Crystalline solids .
2)If the atoms or molecules does not have such periodicity in the substances is known as Amorphous solid.
Q9 : Define Crystal structure ?
The atomic arrangement in a crystal is called crystal structure.
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