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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
How will you test whether a given rod is a magnet or not ?
Describe a simple experiment to illustrate that like poles of two magnets repel each other while the unlike poles attract ?
How are the magnets kept safely? What is the role of keepers in storing the magnets?
Define the following term regarding a bar magnet:
Magnetic field
Answer the following in detail.
How can a magnet be demagnetized?
Distinguish between the two methods of making artificial magnets.
Draw lines of force surrounding a bar magnet when it is placed in the magnetic meridian with its north pole pointing geographic, north.
The figure shows a freely suspended magnet in the rest position. Copy the diagram and on its show:
- Angle of declination
- Angle in dip
Consider the statement given below and choose the correct option.
Assertion: Iron filings are concentrated more at the magnetic poles.
Reason: The magnets are so sharp.
