- Introduction
- Rest time! Have fun
- Physics
- Chemistry
- BIOLOGY
- Reaching the age of Adolescence
- CROP PRODUCTION AND MANAGMENT
- Cells : The basic structural unit of life
- Nutrition in human beigns
- RESPIRATION IN HUMAN BEIGNS
- TRANSPORTATION IN HUMAN BEIGNS
- excretory system in human beigns
- NERVOUS SYSTEM
- PHOTOSYNTHESIS
- Respiration in plants
- REPRODUCTION IN PLANTS
- MOVEMENTS IN PLANTS
- Forest our lifeline
- WASTE WATER STORY
- WEATHER,CLIMATE AND ITS ADAPTATION .
- Reaching the age of Adolescence
- Model tests
- Animation time
Magnetism
The world magnet comes from Latin word magnes which meant attraction.
How the magnet was discovered ?
It was discovered by a shepherd Magnus who lived in city Magnesia . He noted that the nails fixed to his shoes were attracted by a piece of stone. This stone was magnet.
Types of Magnets
1. Natural magnet
2. Artificial magnet
1. Natural magnets are the magnets which are found in nature without any mankind.
They are quite weak.
2. Artificial magnet are made by mankind.
They are powerful and strong.
Artificial magnets have regular shape.
Properties of magnets
1. Magnet and other magnetic substances like iron attract each other.
2. Magnet has two poles i.e North pole and South pole.
3. Magnet has property of indicating direction i.e North-South direction .
4. Attraction will be highest at the poles.
5. Like poles repel and this force is called repulsive force and Unlike poles attract and this force is called attractive force.
6. Poles of magnet cannot be isolated as it has two poles only. i.e North pole and South pole.
7. Both the poles of magnets will have same power to attract.
8. On heating Kinetic energy of magnets will increase and thus decreases magnetic strength.
Magnetic field
1.The area where magnetic field is present is known as Magnetic field.
2.It is represented by a set of lines which is said to be magnetic lines of force.
3.Magnetic lines of force are denser where the field strength of magnet is strong.
4.These lines travel from North pole to South pole.
5. They appear to be in tension as in a bent can held presses in form of an arc.
6. These can penetrate through paper,glass,etc
Magnetic materials are mainly classified into-
1. Diamagnetic materials
2. Para-magnetic materials
3. Ferromagnetic materials
1. Diamagnetic materials-
Diamagnetic materials have feeble magnetism against the direction of external magnetic field.
Ex- Antimony,lead,gold,etc
2. Para-magnetic materials
Para-magnetic materials have feeble magnetism with the direction of external magnetic field.
Its strength increases if its temperature decreases.
Ex- Aluminium, Platinum and Magnesium,etc
3. Ferromagnetic magnetic materials-
Materials which get strongly magnetized in the direction pf external field.
They are permanent magnets.
Ex- Iron,Cobalt and Nickel,etc
How the magnet was discovered ?
It was discovered by a shepherd Magnus who lived in city Magnesia . He noted that the nails fixed to his shoes were attracted by a piece of stone. This stone was magnet.
Types of Magnets
1. Natural magnet
2. Artificial magnet
1. Natural magnets are the magnets which are found in nature without any mankind.
They are quite weak.
2. Artificial magnet are made by mankind.
They are powerful and strong.
Artificial magnets have regular shape.
Properties of magnets
1. Magnet and other magnetic substances like iron attract each other.
2. Magnet has two poles i.e North pole and South pole.
3. Magnet has property of indicating direction i.e North-South direction .
4. Attraction will be highest at the poles.
5. Like poles repel and this force is called repulsive force and Unlike poles attract and this force is called attractive force.
6. Poles of magnet cannot be isolated as it has two poles only. i.e North pole and South pole.
7. Both the poles of magnets will have same power to attract.
8. On heating Kinetic energy of magnets will increase and thus decreases magnetic strength.
Magnetic field
1.The area where magnetic field is present is known as Magnetic field.
2.It is represented by a set of lines which is said to be magnetic lines of force.
3.Magnetic lines of force are denser where the field strength of magnet is strong.
4.These lines travel from North pole to South pole.
5. They appear to be in tension as in a bent can held presses in form of an arc.
6. These can penetrate through paper,glass,etc
Magnetic materials are mainly classified into-
1. Diamagnetic materials
2. Para-magnetic materials
3. Ferromagnetic materials
1. Diamagnetic materials-
Diamagnetic materials have feeble magnetism against the direction of external magnetic field.
Ex- Antimony,lead,gold,etc
2. Para-magnetic materials
Para-magnetic materials have feeble magnetism with the direction of external magnetic field.
Its strength increases if its temperature decreases.
Ex- Aluminium, Platinum and Magnesium,etc
3. Ferromagnetic magnetic materials-
Materials which get strongly magnetized in the direction pf external field.
They are permanent magnets.
Ex- Iron,Cobalt and Nickel,etc