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प्रश्न
Explain with the help of a diagram how the intensity and direction of the magnetic field of a bar magnet can be determined.
उत्तर
Take 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 as shown below.
To find the direction of the magnetic field around a bar magnet, place a magnetic compass with its South-Pole near one of the poles of the bar magnet. Locate and the point where the North-pole of the needle points. Now, lift the needle and place its South-Pole on the marked point. Now, again see where it North-Pole points. Repeat this process and you will get the direction of the magnetic field as shown below.
To find the intensity of the magnetic field around a region of a bar magnet, we need to calculate the number of lines crossing through the unit area of that region. For example, if we have to calculate the intensity of the magnetic field at points A and B, then draw unit areas around A and B first and then calculate the number of lines passing through that area. By doing so, we see that the intensity of the field at A is greater than that at B.
संबंधित प्रश्न
Why don’t two magnetic lines of force intersect each other?
List three sources of magnetic fields.
A magnet attracts:
Why does a freely suspended magnet always rest in a north-south direction?
The shape of the Earth’s magnetic field resembles that of an imaginary ______.
Define magnetic field.
The magnetic field inside a ______ is uniform.
The ______ produces its own magnetic field, which shields the earth’s ozone layer from the ______ and is important in navigation.
The magnetic field is a quantity that has magnitude only.
Define magnetic shielding.
