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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
State two properties of a bar magnet ?
The alloys called ______ and ______ are used for making industrial magnets.
Fill the blank spaces in the table given below:
| Nature of bar | Action of compass needle | |
| North Pole | South Pole | |
| Non-magnetic | No action | ________ |
| ________ | attracted | attracted |
| North pole of a bar magnet | ________ | _________ |
| ________ | attracted | repelled |
Draw lines of force surrounding a bar magnet when it is placed in the magnetic meridian with its north pole pointing geographic south.
What are magnetic keepers? What are they used for?
Write a short note on lighting conductors.
You are provided with two identical metal bars. One out of the two is a magnet. Suggest two ways to identify the magnet.
The strongest natural magnet is ______.
Define artificial magnet.
Define electromagnet.
