Dielectrics And Polarization
Chapter Name : Electrostatic Potentials And Capacitance |
Sub Topic Code : 101_12_02_10_01 |
Topic Name : Dielectrics And Polarization |
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Sub Topic Name : Dielectrics And Polarization |
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Introduction
Dielectric is an electrical insulator that can be polarized by an applied electric field.
Pre-Requisites:
Dielectric
Activity:
Capacitor.
Real Life Question:
What is polarization?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Polarization | Polarization occurs when an electric field distorts the negative cloud of electrons around positive atomic nuclei in a direction opposite the field. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Capacitor | A passive two-terminal electrical component used to store energy in an electric field. |
Real life uses :
Capacitor.
Places to visit :
Electronic devices.
Practical examples around us
| Examples | Explainations |
|---|---|
| Dielectric resonator | A dielectric resonator oscillator (DRO) is an electronic component that exhibits resonance for a narrow range of frequencies, generally in the microwave band. |
What you learn in Theory:
A dielectric is an electrical insulator that can be polarized by an applied electric field. When a dielectric is placed in an electric field, electric charges do not flow through the material as they do in a conductor, but only slightly shift from their average equilibrium positions causing dielectric polarization.
What you learn in Practice:
Because of dielectric polarization, positive charges are displaced toward the field and negative charges shift in the opposite direction.