Charging By Induction
Chapter Name : Electric Charges And Fields |
Sub Topic Code : 101_12_01_04_01 |
Topic Name : Charging By Induction |
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Sub Topic Name : Charging By Induction |
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Introduction
When electrified rods are brought near light objects, they are charged. This is called charging by induction.
Pre-Requisites:
Introduction about Electric charge, conductors and insulators
Activity:
You can see the charge transfer from animal fur to foam in an electrophorus activity, and observe the type of induced charges.
Real Life Question:
“How can an Electric toothbrush be charged again?”
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Induction Induction of charge | Distribution of electric charges on any object without contact. A situation where force of attraction between unlike charges is equal to the force of repulsion between like charges in any conductor. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Electric toothbrush | See how its battery can be charged by induction process. |
Real life uses :
Tooth brushes, charging of hand held electronics like mobiles, music systems etc.
Places to visit :
You can visit your school physics lab to see the common examples of induction; also you can visit any electronic shop to see the working and charging of electric toothbrush and wireless charger.
Practical examples around us
| Examples | Explainations |
|---|---|
| Electric Toothbrush Wireless charge pads | These toothbrushes use inductive charging. These use the principle of charging by induction in charging of mobiles, music players etc. |
What you learn in Theory:
When electrified rods are brought near light objects, they are charged by Induction. In the bodies in which charge is induced force of attraction is more than the force of repulsion.
What you learn in Practice:
It is free electrons which make any material conducting. When the distribution of these free electrons happen on the conductor surface, that is called induction.