Topics
Physical Quantities and Measurement
- Measurements
- Physical Quantities
- Volume and It’s Unit
- Measurement of Volume
- Area and It’s Unit
- Measurement of Area
- Density and It’s Unit
- Measurement of Density
- Determination of Density of a Regular Solid
- Determination of Density of an Irregular Solid
- Determination of Density of a Liquid
- Speed
Force and Pressure: Motion
Energy
- Concept of Energy
- Forms of Energy > Solar Energy
- Forms of Energy > Mechanical Energy
- Mechanical Energy > Potential Energy (U)
- Mechanical Energy > Kinetic Energy (K)
- Types of Kinetic Energy
- Conversion of Potential Energy into Kinetic Energy
- Conversion of Energies
- Principle of Conservation of Energy
- Electricity Generation using Hydroelectric Energy
Light Energy
- Climatic Factors > Light
- Reflection of Light
- Plane Mirror
- Terms Used in Reflection of Light
- Law of Reflection of Light
- Verification of the Law of Reflection of Light
- Reflection of a Ray of Light Normally Incident on a Plane Mirror
- Images Formed by a Plane Mirrors
- Formation of Image by Reflection: Real and Virtual Image
- Lateral Inversion
- Types of Reflection
- Speed of Light in Different Media
- Colour
Heat
Sound
Electricity and Magnetism
- Magnet
- Discovery of Magnets
- Classification of Magnets
- Magnetic Properties of Materials
- Laws of Magnetism
- Magnetic Field
- Electromagnet
- Making of an Electromagnet
- Uses of Electromagnet
- Electric Bell
- Earth’s Magnetic Declination
- Electricity
- Sources of Electricity
- Electric Circuit
- Electrical Conduction in Solids
- Analogy of Electric Current with Water Flow
- Flow of Charges (Electrons) Between Conductor
- Symbols and Functions of Various Components of an Electric Circuits
- Types of Circuits: Series Circuit
- Types of Circuits: Parallel Circuit
- Electric cell
- Battery
Maharashtra State Board: Class 6
Discovery of Magnets:
Magnes was a shepherd who lived in ancient Greece. According to legend, he played a key role in discovering magnets.
- One day, while Magnes was resting on a large rock with his sheep nearby, something unexpected happened. When he tried to stand up, he couldn't move easily.
- His walking staff and the shoes, which had iron parts, were stuck to the rock. It took a lot of effort for him to pull himself free.
- Unlike other rocks, this particular rock had the ability to attract iron. This was because the rock contained magnetite, a naturally magnetic material.
- The rock was named magnetite after Magnes, the shepherd. This is how magnetite got its name and how people began to understand the properties of magnetic materials.
- It is also believed that the word "magnet" might have originated from "Magnesia," a region in Greece where these magnetic rocks were first found.
The story of Magnes
