CG Board Class 6 Science Magnetism Notes / Textbook Exercises / Question Answers as well as Additional Question Answers from the Chapter.
Discovery of the Magnet:
A shepherd named Magnus discovered magnets around 2000 years ago in a village in Asia Minor.
He found black stones (iron ore) with the ability to attract iron attached to his iron-tipped stick near a waterfall.
Natural magnets, like magnetite (iron ore), exist in nature but are not very powerful.
They have irregular shapes, are less stable, and fragile, making them less practical for most purposes.
Powerful artificial magnets are made from materials like steel, cobalt-steel, nickel-steel, or aluminum-nickel-cobalt alloy (Alnico).They are more stable and widely used in various shapes and sizes.
Types of Artificial Magnets:
Bar Magnet (Rod Magnet): Shaped like cuboids or cylinders.
Horse-shoe Shaped Magnet: Bar magnets bent in the shape of a horseshoe.
U-shaped Magnet: Formed by bending rod magnets into a U-shape.
Spherical Magnet: A long rod with spheres at its ends.
Magnetic Needle: Flat, thin steel pieces with a central pivot to move freely horizontally.
Magnetic Compass: Magnetic needles in boxes with transparent plates used for navigation.
Magnetic vs. Non-Magnetic Substances:
Magnetic Substances: Attracted by magnets and can be turned into magnets. Examples include iron, cobalt, nickel, and their alloys.