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प्रश्न
How will you do this?
Explain that a magnet has a certain magnetic field.
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उत्तर
A magnet has a certain magnetic field, which can be demonstrated using the below activity.
Take some drawing cardboard and sprinkle some iron filings on it. Notice the position of the iron filings as a whole. Now, take a bar magnet and slowly bring it below the cardboard. You will observe that the iron filings tend to attract towards the magnet and align themselves as shown.
It represents that the magnet exerts a force around its body with a stronger force near the two poles. Also, this regular pattern of the iron filings on the board represents the lines of magnetic field. Thus, a magnet has a certain magnetic field, which can be represented by curved lines around the magnet.
संबंधित प्रश्न
What is declination ? Draw a diagram to show the angle between the declination and true direction of geographic north.
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 |
Answer the following.
Why is it not possible to isolate a single magnetic pole?
Give a reason for the following.
Iron is a magnetic substance.
Define the following term regarding a bar magnet:
Magnetic field
Answer the following in detail.
Write a short note on the theory of magnetism.
Answer the following in detail.
How can a magnet be demagnetized?
An object that is attracted by magnet.
What are the factors that determine the strength of the magnet?
The strongest natural magnet is ______.
