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प्रश्न
Answer the following in short.
What is a magnet? Differentiate between natural and artificial magnets.
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
How will you test whether a given rod is made of iron or not?
You are given two similar bars. One is a magnet and the other is of soft iron. How will you distinguish and identify them ?
State four important properties of a bar magnet?
If a bar magnet is cut into equal pieces by cutting it at right angles to its axis at two places, ______ bar magnets are formed, and a total of _____ poles are formed.
Distinguish between the two methods of making artificial magnets.
Bar magnets are often stored in pairs as shown in the figure. E and F being pieces of metal.
Why are E and F placed in contact with the poles of the magnets as shown in the diagram?
Define the term Poles of a magnet
Give scientific reason:
Not attraction but repulsion is a sure test of magnetism.
Distinguish between
Natural and artificial magnets.
The magnetic poles always exist in pairs.
