SlideShare a Scribd company logo
TYPES OF POLARIZATION
MADE BY
AAKASH TOMAR
ENG21DS0001
WHAT IS DIELECTRIC POLARIZATION
When an electric field is applied across a dielectric material then
the dielectric material becomes polarized . This mechanism is
called dielectric polarization.
TYPES OF POLARIZATION
There are four types of polarization
1. Electronic polarization
2. Ionic polarization
3. Orientational polarization
4. Space charge polarization
Electronic Polarization
Expression for Electronic Polarization
• Hence electronic polarizability is directly proportional to cube of the
radius of the atom
Ionic polarization
Orientational Polarization
When an electric field is applied on an dielectric material with
permanent dipole moment (μ), the applied field tries to orient the
dipole along its direction . The orientational polarization is given by
αo is orientation polarizability
• Thus the orientational polarizability is a temperature dependent term
and is inversely proportional to the absolute temperature of the
dielectric material.
• It is slow process compare to ionic and electronic polarization.
• All the molecular dipoles are oriented randomly when there is no
Electric field.
• In the presence of the electric field these dipoles orient themselves in
the direction of field as a result the net dipole moment becomes
enormous.
Space charge polarization
• When an electric field is applied to a bulk dielectric material the
charges in the material diffuse to a considerable distance with
response to the applied field .
• This is very slow process and contribution to the total polarization
from space charge polarization is neglizible .
Total Polarization
• Total Polarization is the sum of polarizations due to electronic ,ionic,
orientational and space charge polarizabilities.
THANK YOU

More Related Content

What's hot

Ferroelectric and piezoelectric materials
Ferroelectric and piezoelectric materialsFerroelectric and piezoelectric materials
Ferroelectric and piezoelectric materials
Zaahir Salam
 
3515_Ch 6_Dielectric Properties of Materials_ M A Islam
3515_Ch 6_Dielectric Properties of Materials_ M A Islam3515_Ch 6_Dielectric Properties of Materials_ M A Islam
3515_Ch 6_Dielectric Properties of Materials_ M A IslamDr. Mohammad Aminul Islam
 
Hetero junction
Hetero junctionHetero junction
Hetero junction
yoga prabha
 
Ferrites
Ferrites Ferrites
Ferrites
Nikita Gupta
 
Fermi dirac basic part 1
Fermi dirac basic part 1Fermi dirac basic part 1
Fermi dirac basic part 1
kiranmadhale1
 
SEMICONDUCTOR PHYSICS
SEMICONDUCTOR PHYSICSSEMICONDUCTOR PHYSICS
SEMICONDUCTOR PHYSICS
Vaishnavi Bathina
 
Photoconductivity.pptx
Photoconductivity.pptxPhotoconductivity.pptx
Photoconductivity.pptx
MAbrarMalik1
 
Dielectric materials
Dielectric materialsDielectric materials
Dielectric materials
RUSHIT PATEL
 
Dielectrics
DielectricsDielectrics
SPECTRA OF ALKLI ELEMENT, SPIN ORBIT INTERACTION & FINE STRUCTER OF ALKLI SP...
SPECTRA OF ALKLI ELEMENT, SPIN  ORBIT INTERACTION & FINE STRUCTER OF ALKLI SP...SPECTRA OF ALKLI ELEMENT, SPIN  ORBIT INTERACTION & FINE STRUCTER OF ALKLI SP...
SPECTRA OF ALKLI ELEMENT, SPIN ORBIT INTERACTION & FINE STRUCTER OF ALKLI SP...
AnitaMalviya
 
Energy bands and gaps in semiconductor
Energy bands and gaps in semiconductorEnergy bands and gaps in semiconductor
Energy bands and gaps in semiconductor
Ganapathirao Kandregula
 
Electroluminesecnce
ElectroluminesecnceElectroluminesecnce
Electroluminesecnce
Sudama04
 
Hall effect from A to Z
Hall effect from A to Z Hall effect from A to Z
Hall effect from A to Z
hebabakry7
 
Fermi energy
Fermi energyFermi energy
Fermi energy
Hirunika Athtanayeke
 
Hall effect
Hall effect Hall effect
Hall effect
Harsh Shukla
 
Quantum free electron theory
Quantum free electron theoryQuantum free electron theory
Quantum free electron theory
Debi Prasad Dash
 
Physics feromagnetism
Physics feromagnetismPhysics feromagnetism
Physics feromagnetism
Sinta ayu Sakinah
 
Specific Heat Capacity
Specific Heat CapacitySpecific Heat Capacity
Specific Heat Capacity
A. S. M. Jannatul Islam
 

What's hot (20)

Ferroelectric and piezoelectric materials
Ferroelectric and piezoelectric materialsFerroelectric and piezoelectric materials
Ferroelectric and piezoelectric materials
 
3515_Ch 6_Dielectric Properties of Materials_ M A Islam
3515_Ch 6_Dielectric Properties of Materials_ M A Islam3515_Ch 6_Dielectric Properties of Materials_ M A Islam
3515_Ch 6_Dielectric Properties of Materials_ M A Islam
 
Hetero junction
Hetero junctionHetero junction
Hetero junction
 
Superconductivity
SuperconductivitySuperconductivity
Superconductivity
 
Ferrites
Ferrites Ferrites
Ferrites
 
Fermi dirac basic part 1
Fermi dirac basic part 1Fermi dirac basic part 1
Fermi dirac basic part 1
 
SEMICONDUCTOR PHYSICS
SEMICONDUCTOR PHYSICSSEMICONDUCTOR PHYSICS
SEMICONDUCTOR PHYSICS
 
Photoconductivity.pptx
Photoconductivity.pptxPhotoconductivity.pptx
Photoconductivity.pptx
 
Dielectric materials
Dielectric materialsDielectric materials
Dielectric materials
 
Dielectrics
DielectricsDielectrics
Dielectrics
 
SPECTRA OF ALKLI ELEMENT, SPIN ORBIT INTERACTION & FINE STRUCTER OF ALKLI SP...
SPECTRA OF ALKLI ELEMENT, SPIN  ORBIT INTERACTION & FINE STRUCTER OF ALKLI SP...SPECTRA OF ALKLI ELEMENT, SPIN  ORBIT INTERACTION & FINE STRUCTER OF ALKLI SP...
SPECTRA OF ALKLI ELEMENT, SPIN ORBIT INTERACTION & FINE STRUCTER OF ALKLI SP...
 
Energy bands and gaps in semiconductor
Energy bands and gaps in semiconductorEnergy bands and gaps in semiconductor
Energy bands and gaps in semiconductor
 
Electroluminesecnce
ElectroluminesecnceElectroluminesecnce
Electroluminesecnce
 
Photodetectors
PhotodetectorsPhotodetectors
Photodetectors
 
Hall effect from A to Z
Hall effect from A to Z Hall effect from A to Z
Hall effect from A to Z
 
Fermi energy
Fermi energyFermi energy
Fermi energy
 
Hall effect
Hall effect Hall effect
Hall effect
 
Quantum free electron theory
Quantum free electron theoryQuantum free electron theory
Quantum free electron theory
 
Physics feromagnetism
Physics feromagnetismPhysics feromagnetism
Physics feromagnetism
 
Specific Heat Capacity
Specific Heat CapacitySpecific Heat Capacity
Specific Heat Capacity
 

Similar to TYPES OF POLARIZATION

DIELCTRIC MATERIALS.pptx
DIELCTRIC MATERIALS.pptxDIELCTRIC MATERIALS.pptx
DIELCTRIC MATERIALS.pptx
varunapriya6
 
Electrical polarization mechanisms
Electrical polarization mechanismsElectrical polarization mechanisms
Electrical polarization mechanisms
Digvijaysinh Gohil
 
Dielectric constant and polarizibality
Dielectric constant and polarizibalityDielectric constant and polarizibality
Dielectric constant and polarizibality
junaidhassan71
 
Dielectric materials-3.pptx
Dielectric materials-3.pptxDielectric materials-3.pptx
Dielectric materials-3.pptx
namansinghjarodiya
 
Ferroelectric & pizeoelectric materials
Ferroelectric & pizeoelectric materialsFerroelectric & pizeoelectric materials
Ferroelectric & pizeoelectric materials
Avaneesh Mishra
 
ELECTROSTATIC INDUCTION
ELECTROSTATIC INDUCTIONELECTROSTATIC INDUCTION
ELECTROSTATIC INDUCTION
Sheeba vinilan
 
Dielectric Properties of Insulating Materials
Dielectric Properties of Insulating MaterialsDielectric Properties of Insulating Materials
Dielectric Properties of Insulating Materials
rajendra purkar
 
DielectricsDielectricsDielectricsDielectricsDielectrics
DielectricsDielectricsDielectricsDielectricsDielectricsDielectricsDielectricsDielectricsDielectricsDielectrics
DielectricsDielectricsDielectricsDielectricsDielectrics
monishasarai25
 
EMWT_UNIT 1_DIELECTRICS.pptx
EMWT_UNIT 1_DIELECTRICS.pptxEMWT_UNIT 1_DIELECTRICS.pptx
EMWT_UNIT 1_DIELECTRICS.pptx
ssuserbdc8671
 
Dielectric properties[read only]
Dielectric properties[read only]Dielectric properties[read only]
Dielectric properties[read only]
kveerabhadrarao1
 
Fundamenals of magnetism and applications
Fundamenals of magnetism and applicationsFundamenals of magnetism and applications
Fundamenals of magnetism and applications
Praveen Vaidya
 
Electronics and Intra Operative Neurophysiological Monitoring
Electronics and Intra Operative Neurophysiological MonitoringElectronics and Intra Operative Neurophysiological Monitoring
Electronics and Intra Operative Neurophysiological Monitoring
Anurag Tewari MD
 
The piezoelectric effect
The piezoelectric effectThe piezoelectric effect
The piezoelectric effect
Nicola Ergo
 
Material engineering and its applications.
Material engineering and its applications.Material engineering and its applications.
Material engineering and its applications.
Omkar Rane
 
Dielectric properties
Dielectric propertiesDielectric properties
Dielectric properties
AfifaRizwan
 
Polarization
PolarizationPolarization
Polarization
vijayakumar sivaji
 
Dielectric properties
Dielectric properties Dielectric properties
Dielectric properties
Hari Prasad Kamatam
 
Static Magnetic Field(Electromagnetic Fields and Waves)
Static Magnetic Field(Electromagnetic Fields and Waves)Static Magnetic Field(Electromagnetic Fields and Waves)
Static Magnetic Field(Electromagnetic Fields and Waves)
MdJubayerFaisalEmon
 
Magnetic properties
Magnetic propertiesMagnetic properties

Similar to TYPES OF POLARIZATION (20)

DIELCTRIC MATERIALS.pptx
DIELCTRIC MATERIALS.pptxDIELCTRIC MATERIALS.pptx
DIELCTRIC MATERIALS.pptx
 
Electrical polarization mechanisms
Electrical polarization mechanismsElectrical polarization mechanisms
Electrical polarization mechanisms
 
Dielectric constant and polarizibality
Dielectric constant and polarizibalityDielectric constant and polarizibality
Dielectric constant and polarizibality
 
Dielectric materials-3.pptx
Dielectric materials-3.pptxDielectric materials-3.pptx
Dielectric materials-3.pptx
 
Ferroelectric & pizeoelectric materials
Ferroelectric & pizeoelectric materialsFerroelectric & pizeoelectric materials
Ferroelectric & pizeoelectric materials
 
ELECTROSTATIC INDUCTION
ELECTROSTATIC INDUCTIONELECTROSTATIC INDUCTION
ELECTROSTATIC INDUCTION
 
Dielectric Properties of Insulating Materials
Dielectric Properties of Insulating MaterialsDielectric Properties of Insulating Materials
Dielectric Properties of Insulating Materials
 
DielectricsDielectricsDielectricsDielectricsDielectrics
DielectricsDielectricsDielectricsDielectricsDielectricsDielectricsDielectricsDielectricsDielectricsDielectrics
DielectricsDielectricsDielectricsDielectricsDielectrics
 
EMWT_UNIT 1_DIELECTRICS.pptx
EMWT_UNIT 1_DIELECTRICS.pptxEMWT_UNIT 1_DIELECTRICS.pptx
EMWT_UNIT 1_DIELECTRICS.pptx
 
Dielectric properties[read only]
Dielectric properties[read only]Dielectric properties[read only]
Dielectric properties[read only]
 
Unit 4
Unit 4Unit 4
Unit 4
 
Fundamenals of magnetism and applications
Fundamenals of magnetism and applicationsFundamenals of magnetism and applications
Fundamenals of magnetism and applications
 
Electronics and Intra Operative Neurophysiological Monitoring
Electronics and Intra Operative Neurophysiological MonitoringElectronics and Intra Operative Neurophysiological Monitoring
Electronics and Intra Operative Neurophysiological Monitoring
 
The piezoelectric effect
The piezoelectric effectThe piezoelectric effect
The piezoelectric effect
 
Material engineering and its applications.
Material engineering and its applications.Material engineering and its applications.
Material engineering and its applications.
 
Dielectric properties
Dielectric propertiesDielectric properties
Dielectric properties
 
Polarization
PolarizationPolarization
Polarization
 
Dielectric properties
Dielectric properties Dielectric properties
Dielectric properties
 
Static Magnetic Field(Electromagnetic Fields and Waves)
Static Magnetic Field(Electromagnetic Fields and Waves)Static Magnetic Field(Electromagnetic Fields and Waves)
Static Magnetic Field(Electromagnetic Fields and Waves)
 
Magnetic properties
Magnetic propertiesMagnetic properties
Magnetic properties
 

Recently uploaded

Final project report on grocery store management system..pdf
Final project report on grocery store management system..pdfFinal project report on grocery store management system..pdf
Final project report on grocery store management system..pdf
Kamal Acharya
 
Governing Equations for Fundamental Aerodynamics_Anderson2010.pdf
Governing Equations for Fundamental Aerodynamics_Anderson2010.pdfGoverning Equations for Fundamental Aerodynamics_Anderson2010.pdf
Governing Equations for Fundamental Aerodynamics_Anderson2010.pdf
WENKENLI1
 
Investor-Presentation-Q1FY2024 investor presentation document.pptx
Investor-Presentation-Q1FY2024 investor presentation document.pptxInvestor-Presentation-Q1FY2024 investor presentation document.pptx
Investor-Presentation-Q1FY2024 investor presentation document.pptx
AmarGB2
 
Railway Signalling Principles Edition 3.pdf
Railway Signalling Principles Edition 3.pdfRailway Signalling Principles Edition 3.pdf
Railway Signalling Principles Edition 3.pdf
TeeVichai
 
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)
MdTanvirMahtab2
 
Nuclear Power Economics and Structuring 2024
Nuclear Power Economics and Structuring 2024Nuclear Power Economics and Structuring 2024
Nuclear Power Economics and Structuring 2024
Massimo Talia
 
Architectural Portfolio Sean Lockwood
Architectural Portfolio Sean LockwoodArchitectural Portfolio Sean Lockwood
Architectural Portfolio Sean Lockwood
seandesed
 
Immunizing Image Classifiers Against Localized Adversary Attacks
Immunizing Image Classifiers Against Localized Adversary AttacksImmunizing Image Classifiers Against Localized Adversary Attacks
Immunizing Image Classifiers Against Localized Adversary Attacks
gerogepatton
 
Water Industry Process Automation and Control Monthly - May 2024.pdf
Water Industry Process Automation and Control Monthly - May 2024.pdfWater Industry Process Automation and Control Monthly - May 2024.pdf
Water Industry Process Automation and Control Monthly - May 2024.pdf
Water Industry Process Automation & Control
 
J.Yang, ICLR 2024, MLILAB, KAIST AI.pdf
J.Yang,  ICLR 2024, MLILAB, KAIST AI.pdfJ.Yang,  ICLR 2024, MLILAB, KAIST AI.pdf
J.Yang, ICLR 2024, MLILAB, KAIST AI.pdf
MLILAB
 
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdf
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdfHybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdf
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdf
fxintegritypublishin
 
在线办理(ANU毕业证书)澳洲国立大学毕业证录取通知书一模一样
在线办理(ANU毕业证书)澳洲国立大学毕业证录取通知书一模一样在线办理(ANU毕业证书)澳洲国立大学毕业证录取通知书一模一样
在线办理(ANU毕业证书)澳洲国立大学毕业证录取通知书一模一样
obonagu
 
The Benefits and Techniques of Trenchless Pipe Repair.pdf
The Benefits and Techniques of Trenchless Pipe Repair.pdfThe Benefits and Techniques of Trenchless Pipe Repair.pdf
The Benefits and Techniques of Trenchless Pipe Repair.pdf
Pipe Restoration Solutions
 
weather web application report.pdf
weather web application report.pdfweather web application report.pdf
weather web application report.pdf
Pratik Pawar
 
Pile Foundation by Venkatesh Taduvai (Sub Geotechnical Engineering II)-conver...
Pile Foundation by Venkatesh Taduvai (Sub Geotechnical Engineering II)-conver...Pile Foundation by Venkatesh Taduvai (Sub Geotechnical Engineering II)-conver...
Pile Foundation by Venkatesh Taduvai (Sub Geotechnical Engineering II)-conver...
AJAYKUMARPUND1
 
Design and Analysis of Algorithms-DP,Backtracking,Graphs,B&B
Design and Analysis of Algorithms-DP,Backtracking,Graphs,B&BDesign and Analysis of Algorithms-DP,Backtracking,Graphs,B&B
Design and Analysis of Algorithms-DP,Backtracking,Graphs,B&B
Sreedhar Chowdam
 
Student information management system project report ii.pdf
Student information management system project report ii.pdfStudent information management system project report ii.pdf
Student information management system project report ii.pdf
Kamal Acharya
 
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...
Dr.Costas Sachpazis
 
block diagram and signal flow graph representation
block diagram and signal flow graph representationblock diagram and signal flow graph representation
block diagram and signal flow graph representation
Divya Somashekar
 
ML for identifying fraud using open blockchain data.pptx
ML for identifying fraud using open blockchain data.pptxML for identifying fraud using open blockchain data.pptx
ML for identifying fraud using open blockchain data.pptx
Vijay Dialani, PhD
 

Recently uploaded (20)

Final project report on grocery store management system..pdf
Final project report on grocery store management system..pdfFinal project report on grocery store management system..pdf
Final project report on grocery store management system..pdf
 
Governing Equations for Fundamental Aerodynamics_Anderson2010.pdf
Governing Equations for Fundamental Aerodynamics_Anderson2010.pdfGoverning Equations for Fundamental Aerodynamics_Anderson2010.pdf
Governing Equations for Fundamental Aerodynamics_Anderson2010.pdf
 
Investor-Presentation-Q1FY2024 investor presentation document.pptx
Investor-Presentation-Q1FY2024 investor presentation document.pptxInvestor-Presentation-Q1FY2024 investor presentation document.pptx
Investor-Presentation-Q1FY2024 investor presentation document.pptx
 
Railway Signalling Principles Edition 3.pdf
Railway Signalling Principles Edition 3.pdfRailway Signalling Principles Edition 3.pdf
Railway Signalling Principles Edition 3.pdf
 
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)
 
Nuclear Power Economics and Structuring 2024
Nuclear Power Economics and Structuring 2024Nuclear Power Economics and Structuring 2024
Nuclear Power Economics and Structuring 2024
 
Architectural Portfolio Sean Lockwood
Architectural Portfolio Sean LockwoodArchitectural Portfolio Sean Lockwood
Architectural Portfolio Sean Lockwood
 
Immunizing Image Classifiers Against Localized Adversary Attacks
Immunizing Image Classifiers Against Localized Adversary AttacksImmunizing Image Classifiers Against Localized Adversary Attacks
Immunizing Image Classifiers Against Localized Adversary Attacks
 
Water Industry Process Automation and Control Monthly - May 2024.pdf
Water Industry Process Automation and Control Monthly - May 2024.pdfWater Industry Process Automation and Control Monthly - May 2024.pdf
Water Industry Process Automation and Control Monthly - May 2024.pdf
 
J.Yang, ICLR 2024, MLILAB, KAIST AI.pdf
J.Yang,  ICLR 2024, MLILAB, KAIST AI.pdfJ.Yang,  ICLR 2024, MLILAB, KAIST AI.pdf
J.Yang, ICLR 2024, MLILAB, KAIST AI.pdf
 
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdf
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdfHybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdf
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdf
 
在线办理(ANU毕业证书)澳洲国立大学毕业证录取通知书一模一样
在线办理(ANU毕业证书)澳洲国立大学毕业证录取通知书一模一样在线办理(ANU毕业证书)澳洲国立大学毕业证录取通知书一模一样
在线办理(ANU毕业证书)澳洲国立大学毕业证录取通知书一模一样
 
The Benefits and Techniques of Trenchless Pipe Repair.pdf
The Benefits and Techniques of Trenchless Pipe Repair.pdfThe Benefits and Techniques of Trenchless Pipe Repair.pdf
The Benefits and Techniques of Trenchless Pipe Repair.pdf
 
weather web application report.pdf
weather web application report.pdfweather web application report.pdf
weather web application report.pdf
 
Pile Foundation by Venkatesh Taduvai (Sub Geotechnical Engineering II)-conver...
Pile Foundation by Venkatesh Taduvai (Sub Geotechnical Engineering II)-conver...Pile Foundation by Venkatesh Taduvai (Sub Geotechnical Engineering II)-conver...
Pile Foundation by Venkatesh Taduvai (Sub Geotechnical Engineering II)-conver...
 
Design and Analysis of Algorithms-DP,Backtracking,Graphs,B&B
Design and Analysis of Algorithms-DP,Backtracking,Graphs,B&BDesign and Analysis of Algorithms-DP,Backtracking,Graphs,B&B
Design and Analysis of Algorithms-DP,Backtracking,Graphs,B&B
 
Student information management system project report ii.pdf
Student information management system project report ii.pdfStudent information management system project report ii.pdf
Student information management system project report ii.pdf
 
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...
 
block diagram and signal flow graph representation
block diagram and signal flow graph representationblock diagram and signal flow graph representation
block diagram and signal flow graph representation
 
ML for identifying fraud using open blockchain data.pptx
ML for identifying fraud using open blockchain data.pptxML for identifying fraud using open blockchain data.pptx
ML for identifying fraud using open blockchain data.pptx
 

TYPES OF POLARIZATION

  • 1. TYPES OF POLARIZATION MADE BY AAKASH TOMAR ENG21DS0001
  • 2. WHAT IS DIELECTRIC POLARIZATION When an electric field is applied across a dielectric material then the dielectric material becomes polarized . This mechanism is called dielectric polarization.
  • 3. TYPES OF POLARIZATION There are four types of polarization 1. Electronic polarization 2. Ionic polarization 3. Orientational polarization 4. Space charge polarization
  • 6.
  • 7.
  • 8.
  • 9. • Hence electronic polarizability is directly proportional to cube of the radius of the atom
  • 11.
  • 12.
  • 13.
  • 14.
  • 15.
  • 16. Orientational Polarization When an electric field is applied on an dielectric material with permanent dipole moment (μ), the applied field tries to orient the dipole along its direction . The orientational polarization is given by αo is orientation polarizability
  • 17. • Thus the orientational polarizability is a temperature dependent term and is inversely proportional to the absolute temperature of the dielectric material. • It is slow process compare to ionic and electronic polarization. • All the molecular dipoles are oriented randomly when there is no Electric field. • In the presence of the electric field these dipoles orient themselves in the direction of field as a result the net dipole moment becomes enormous.
  • 18. Space charge polarization • When an electric field is applied to a bulk dielectric material the charges in the material diffuse to a considerable distance with response to the applied field . • This is very slow process and contribution to the total polarization from space charge polarization is neglizible .
  • 19. Total Polarization • Total Polarization is the sum of polarizations due to electronic ,ionic, orientational and space charge polarizabilities.