Electric Charges
Chapter Name : Electric Charges And Fields |
Sub Topic Code : 101_12_01_02_01 |
Topic Name : Electric Charges |
|
Sub Topic Name : Electric Charges |
|
Introduction
Various types of charges produced on the objects when they are rubbed with some specific material.
Pre-Requisites:
Basic Introduction to charging by rubbing.
Activity:
Type of charges produced when you rub the glass rod with silk or plastic rod with the animal fur. After that try to neutralize those charges.
Real Life Question:
“When a glass rod is rubbed with silk, it gets charged, but when we bring that glass rod in contact with silk why does that charge vanish?”
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Charge Neutralization Gold Leaf Electroscope Charge Transfer | When a positive charge is brought in contact with negative charge, they become ZERO. Instrument used to detect the charge on any body Moving of charge from a charged body to another uncharged body. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Gold Leaf Electroscope | See the pattern of gold leaves when a charged object is touched with metal terminal of Electroscope. |
Real life uses :
In detecting the charge present on any body by Gold Leaf Electroscope.
Places to visit :
You have enough material at home to see the science behind it. Also you can visit to your school physics lab to see the working of Gold Leaf Electroscope.
Practical examples around us
| Examples | Explainations |
|---|---|
| lightning Generation of spark on removing the woolen clothes. | Generation of negative charges in the clouds and positive charges at the earth’s surface neutralizes in the form of lightning. There is generation of charges when our hair get in contact with woolen fur, on removing clothes. |
What you learn in Theory:
Like charges repel each other and unlike charges attract each other. Charge transfer requires a conducting medium. Gold leaf Electroscope is used to detect the charge present on any body.
What you learn in Practice:
There are two types of charges, similar charges repel each other and different charges attract each other and when they are brought in contact they become Zero.