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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
You are given a magnet. How will you use it to find north-south direction at a place?
“Poles exist in pair”. Comment on this statement ?
Which magnet will you use?
You are lost in a forest.
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?
Give scientific reason:
Two steel needles hanging from the lower end of a vertical bar magnet do not hang vertically.
People who made mariner’s compass for the first time.
How can you identify non-magnetic materials? Give an example of a nonmagnetic material.
You are provided with two identical metal bars. One out of the two is a magnet. Suggest two ways to identify the magnet.
