PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoIn the previous sections, we have learned about magnetic fields in detail. In this session, with the help of an activity, we will draw the field lines of a bar magnet.
Steps:
- Set a sheet of white paper on a drawing board using some sticky material.
- Locate a bar magnet in the centre of the paper.
- Spray some iron filings evenly around the bar magnet, as shown in the below figure. You may use a salt sprinkler for this purpose.
- Now, tap the board mildly.
What do you observe?
Observation:
The iron filings organise themselves in a pattern, as shown in the below figure.
Iron filings tracing the magnetic field of a bar magnet
Magnetic field is shown by iron filings
Why do the iron filings arrange in such a pattern? What does this pattern illustrate?
The magnet exerts its impact in the area surrounding it. Therefore, the iron filings experience a force. The force thus exerted makes iron filings order in a pattern. The area surrounding a magnet (where the magnet's force can be recognised) has a magnetic field. The lines along which the iron filings arrange themselves denote magnetic field lines.
Are there any different ways of obtaining magnetic field lines around a bar magnet?
Yes. You can draw yourself the field lines of a bar magnet.
In the upcoming sections, we will do an activity to draw the field lines of a bar magnet by ourselves.
Reference:
https://www.flickr.com/photos/daynoir/2180507603
https://www.flickr.com/photos/oskay/4580558571/in/photostream/
https://www.flickr.com/photos/daynoir/2181293650/
https://www.flickr.com/photos/daynoir/2180506627/in/photostream/
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