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OZONE. ELECTRICITY. Aim. About the Project. Instruction. User. Game. Exit. Division of Atmosphere. What is ozone ?. Formation of Ozone Layer. Formation of Ozone hole. Ozone Profile. Safe our Ozone Layer.

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Presentation Transcript
slide1

OZONE

ELECTRICITY

Aim

About the Project

Instruction

User

Game

Exit

Division of Atmosphere

What is ozone ?

Formation of Ozone Layer

Formation of Ozone hole

Ozone Profile

Safe our Ozone Layer

GOVERNMENT HIGH SCHOOL, VISWANATHAM, SIVAKASI,VIRUDHUNAGAR DISTRICT, TAMILNADU, INDIA-626189

P.KARUNAIDOSS

slide2

ELECTRICITY

§¾÷×

slide3

ELECTRICITY STD. VIII

ELECTRICITY

ELECTRICITY - INTRODUCTION

WHAT IS ELECTRICITY ?

SIMPLE ELECTRIC CIRCUIT

ELECTRIC CIRCUIT SYMBOLS

CONDUCTORS AND INSULATORS

ORSTED RESEARCH

MAGNETIC EFFECT OF CURRENT

USES OF ELECTROMAGNETES

ELECTRIC BELL

slide4

ELECTRICITY STD. VIII

APPLIANCES/DEVICES THAT RUN ON BATTERY

slide5

ELECTRICITY STD. VIII

APPLIANCES/DEVICES THAT RUN ON ELECTRIC POWER

slide6

ELECTRICITY STD. VIII

The Father of Electricity

William Gilbert

Gilbert was the first to use it to mean "like amber in its attractive properties". He recognized that friction with these objects removed a so-called effluvium, which would cause the attraction effect in returning to the object, though he did not realize that this substance (electric charge) was universal to all materials

slide7

ELECTRICITY STD. VIII

ELECTRIC CELL

- BATTERY +

An electric cell is a device which converts chemical energy into electric energy. The cell has two different metal plates – one is the positive terminal and the other is the negative terminal. These plates are kept inside a chemical called electrolyte. The cell is a source of electric current. Electric current is the flow of electrons or charge.

slide8

ELECTRICITY STD. VIII

WHAT IS AN ELECTRIC CIRCUIT ?

- BATTERY +

An electric circuit is the closed path along which electric current flows from the positive terminal to the negative terminal of the battery.

A circuit with a cell and a bulb is given here:

slide9

ELECTRICITY STD. VIII

SIMPLE ELECTRIC CIRCUIT

- BATTERY +

slide10

ELECTRICITY STD. VIII

Parallel Electric Circuit

Series Electric Circuit

Switch 1

Switch 2

Lamp 1

Lamp 2

why symbols

ELECTRICITY STD. VIII

Why symbols?

If you were to describe an electric circuit to someone, it is likely that you would want to draw it. It takes time to draw a circuit, because people might draw batteries, bulbs, etc., in different ways. This could be very confusing. This can be overcome if we use standard symbols to draw a circuit.

slide12

ELECTRICITY STD. VIII

slide13

ELECTRICITY STD. VIII

À¢Ç¡ŠÊì

ÐñÎ

Conductors and Insulators

Conductors

- BATTERY +

Insulators

0

ÃôÀ÷

1

Rupee

¨Á측

slide14

ELECTRICITY STD. VIII

Wind Energy

Tamilnadu Leads Wind energy is an important free, renewable, clean and non-polluting energy source. In a wind farm, huge wind mills convert wind energy into electric energy. Tamil Nadu is the No.1 state in India with the highest wind power generating capacity of about 5,000MW. Most wind farms are in Thoothukudi, Kanyakumari and Thirunelveli Districts of Tamilnadu.

slide15

ELECTRICITY STD. VIII

ØrstedResearch

On 21 April 1820, during a lecture, Ørsted noticed a compass needle deflected from magnetic north when an electric current from a battery was switched on and off, confirming a direct relationship between electricity and magnetism.

slide16

ELECTRICITY STD. VIII

Uses of Electromagnets

Electromagnets are used in many appliances like electric motor, Telegraph, Telephones, Electric bell, etc. Many toys have electromagnets inside. Doctors use small electromagnets to take out tiny pieces of magnetic materials that have accidentally entered the eye.

slide17

ELECTRICITY STD. VIII

Electric bell

An electric bell is a mechanical bell that functions by means of an electromagnet. When an electric current is applied, it produces a repetitive buzzing or clanging sound. Electric bells have been widely used at railroad crossings, in telephones, fire and burglar alarms, as school bells, doorbells, and alarms in industrial plants, but they are now being widely replaced with electronic sounders.

slide18

ELECTRICITY STD. VIII

EXAMPLE OF CONDUCTORS

Question : 1.

Click the Correct Answer

1

Answer

Mica

Plastic

Copper

Paper

slide19

ELECTRICITY STD. VIII

Who found Electromagnetism

Question 2.

Click the Correct Answer

2

Answer

Paradea

Orstead

Ambiare

Pilamming

slide20

ELECTRICITY STD. VIII

FATHER OF ELECTRICITY

Question : 3.

Click the Correct Answer

3

Answer

William Gilbert

Paradea

Orstead

Pilamming

slide21

ELECTRICITY STD. VIII

Which atom has Negative charge?

Question : 4.

Click the Correct Answer

4

Answer

Proton & Neutron

Proton

Neutron

Electron

slide22

ELECTRICITY

Symbol of Battery

Question : 5.

Click the Correct Answer

5

Answer

slide23

1

CORRECT

BACK

slide24

1

WRONG

BACK

slide25

2

CORRECT

BACK

slide26

2

WRONG

BACK

slide27

3

CORRECT

BACK

slide28

3

WRONG

BACK

slide29

4

CORRECT

BACK

slide30

4

WRONG

BACK

slide31

5

CORRECT

BACK

slide32

5

WRONG

BACK

slide33

ELECTRICITY STD. VIII

END