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प्रश्न
Since every iron atom is a tiny magnet, why are not all iron bar magnets?
उत्तर
Each molecule of a magnetic substance is an independent magnet. But in an unmagnetised iron piece, molecular/ atoms (tiny magnets) are not arranged in any order and hence they neturalise the magnetic forces of each other As a result, any unmagnetised iron piece can not behave as a magnet.
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संबंधित प्रश्न
Match the following
| Column A | Column B |
| A) Steel | 1) to store magnets |
| B) Soft iron | 2) temporary magnet |
| C) Use in electric bell | 3) permanent magnet |
| D) Magnetic keepers | 4) electromagnet |
Fill in the blank.
Magnetic poles always exist in ...............
Answer the following in short.
What is a magnet? Differentiate between natural and artificial magnets.
Answer the following in detail.
List four methods of magnetizing a magnetic substance.
Write the answer in your word.
Write the properties of a magnet.
Describe, how you will proceed to determine the position of the pole of a bar magnet.
What is meant by electrostatic induction? You have been given two metal containers A and Band a positively charged body X. With the help of a diagram, explain the different stages of charging - A positively, and B negatively.
Maximum iron filings stick in the middle of a bar magnet when it is brought near them.
The magnetic poles always exist in pairs.
Give the uses of magnets in everyday life.
