Conductors And Insulators
Chapter Name : Electric Charges And Fields |
Sub Topic Code : 101_12_01_03_01 |
Topic Name : Conductors And Insulators |
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Sub Topic Name : Conductors And Insulators |
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Introduction
When some charge is transferred to a conductor, it gets spread over the entire surface of the conductor.
Pre-Requisites:
Introduction about Electric charge, types of charges
Activity:
Observe the home wiring carefully. See how many wires it consists and identify them.
Real Life Question:
“Why the plugs of electric appliances are of three terminals?” “Why there is earth wire at home?” “How many wires does our home wiring use?”
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| conductors insulators Earthing | Those substances which allow electricity to pass through them. Those substances which don’t allow electricity to pass through them. Process of flow of charges into the earth through any conducting medium. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Rubber, wood, copper, water | See which of the following conducts electricity used in an electrical circuit made up of bulb, cell and wire. |
Real life uses :
Earth wire is used to avoid damage due to the earth faults. We use copper wires in the home wiring to conduct the electricity.
Places to visit :
You can visit to your school physics lab also you can visit any under construction building to see the earth wiring.
Practical examples around us
| Examples | Explainations |
|---|---|
| Plugs of Electric appliances Home wiring | These are of three terminals to avoid the earthing. Wiring system in houses is made up of copper wires to conduct the electricity. |
What you learn in Theory:
When some charge is transferred to a conductor, it gets spread over the entire surface of the conductor. Conductors allow passing of electricity through them while Insulators don’t allow passing of electricity through them.
What you learn in Practice:
Flow of current to the earth through a conducting medium is called earthing and it is very useful in protecting our home appliances from being damaged.