weSANKAR &

REJI

HOW DOES ENERGY HOW DOES ENERGY INFLUENCE OUR LIFE ?INFLUENCE OUR LIFE ?

What are different types of electricity ?

Why do we afraid of lightning ?

What is the need of earthing ?

Static electricity is produced by the friction of suitable materials

The material which loose electrons gets positive charge and the other gets negative charge.

STATIC ELECTRICITY

++

+

+++

+

+

_

__

_

_

_

++

++

++

WHY DO MATERIALS ATTRACT TOWARDS A CHARGED SUBSTANCE ? When a charged

substance bring towards another material there will be a rearrangement of electrons in itself.

Meterials used for rubbing Nature of attraction

1 2 Attracting Not attracting

Silk Glass

Silk Ebonite

Polyester Glass

Polyester Rubber

SELECT THE RIGHT BUTTON

Like charges repel

Unlike charges attract

DISTRIBUTION OF CHARGES IN CONDUCTORS

ELECTROSCOPE

EARTH IS AN ELECTRON BANK

LIGHTNING

The electric discharge between the clouds in the atmosphere

LIGHTNING CONDUCTOR

Lightning conductor is a device which protects buildings from the damage that may be caused by lightning

NEED OF EARTHING

__

__ _

__ _

THE MAGICIAN WHO SEIZED LIGHTNING

•Benjamin Franklin

PRECAUTIONS FROM LIGHTNING

1. Do not take shelter near a tall tree or lone tree.

2. Do not stand or walk along plain ground

3. It is better to lie flat on the ground4. Never keep touching metallic parts5. Do not use electrical appliances

YOU ARE RIGHT

SORRY YOU ARE WRONG

RESOURCES

Encarta cd

VIII Standard Text book

+2 physics Text book