Dipole In A Uniform External Field
Chapter Name : Electric Charges And Fields |
Sub Topic Code : 101_12_01_12_01 |
Topic Name : Dipole In A Uniform External Field |
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Sub Topic Name : Dipole In A Uniform External Field |
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Introduction
There is a generation of torque in the dipole, which tends to align the dipole with the field.
Pre-Requisites:
Basic introduction about electric dipole and dipole moment.
Activity:
You can find out the reason behind the facts that balloon attracts dry hair, refill attracts polythene etc.
Real Life Question:
Find out the reason why a charged comb attracts the pieces of paper, in the terms of dipole moment.
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Polarization | The process in which a charged object produces a net dipole moment in a body. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Basic experiments of charges by rubbing | You can see the reason behind the facts that balloon attracts dry hair, refill attracts polythene etc. |
Real life uses :
To know the nature and the polarity of the molecule, which may be useful.
Places to visit :
You have basic required things at home, u can also visit to the physics lab and refer to text book.
Practical examples around us
| Examples | Explainations |
|---|---|
| Every molecule around us | When electric field is applied to the molecule, direction of dipole tends to be in the direction of field, due to torque. |
What you learn in Theory:
In a uniform electric field force on the dipole is 0, but torque is non zero. Which tends to align the dipole in the direction of the electric field.
What you learn in Practice:
It can explain the reason of the attraction when charges are developed due to friction. Which can be due to net dipole moment present in the molecules.