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प्रश्न
Answer the following in short.
What is a magnet? Differentiate between natural and artificial magnets.
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उत्तर
A magnet is a piece of metal that can attract metals such as iron-cobalt and nickel. Naturally occurring rocks such as Lodestone or magnetite have the ability to attract magnetic substances and hence are called natural magnets.
Magnets that are made by man from magnetic substances ara called artificial magnets. These come in different shapes such as bar magnets, horseshoe magnets, disc magnets, and ring magnets. Artificial magnets can be made in any size, shape or strength as desired but natural magnets cannot be made as desired.
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संबंधित प्रश्न
Fill in the blank
To light a table lamp and to run a refrigerator, we use ______ as the source of electricity.
Answer the following in detail.
List four methods of magnetizing a magnetic substance.
Answer the following in detail.
How can a magnet be demagnetized?
Define the following term regarding a bar magnet:
Effective length
Bar magnets are often stored in pairs as shown in the figure. E and F being pieces of metal.
Mark on the diagram the poles of the second magnet,
What do you understand by the term magnetic declination?
With the help of a diagram explain the following:
Magnetisation of an iron bar by a single touch method.
Artificial magnets are made in different shapes such as ______, _____ and _______.
Magnets are used in _______ for generating electricity.
