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If you lay a sheet of plastic over a bar magnet and shake iron filings onto the plastic sheet how will the iron filings look?
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If you are given some iron fillings and a magnet describe how you would find the poles of the magnet?
If possible cover the magnet with a sheet of paper and gently sprinkle the iron filings over the sheet ot paper, they will stick in a pattern following the magnetic "lines of flux" which will get closer and closer near the poles of the magnet. Afterwards you can cleanup by lifting the sheet of paper off of the magnet and the filings will fall away. Without the paper the filings will usually become tightly stuck to the magnet, making it hard to clean.
What can you infer about magnetic fields and paper?
You can infer nothing about a magnetic field from paper alone, or about paper from a magnetic field. If you put iron filings on a horizontal sheet of paper and put a magnet below the paper, you may be able to visualize the magnetic field of the magnet and thus infer its dipole arrangement.
Why will chalk dust on a plastic sheet placed over a bar magnet not show the shape of the magnetic field?
Chalk dust (calcium carbonate) is not magnetisable.
Electric lines of force never cress Why?
I think you mean "cross". And furthermore I think you mean the old iron filings around a bar magnet demonstration showing "magnetic lines of force". With all this guessing I propose an answer that your teacher won't like either: They don't cross because they don't exist. To prove this-- Sprinkle the iron filings on paper with a magnet beolw the sheet. Notice that they don't move. Photograph it. Do the experiment again. Photgraph this too and compare the two photos. They will be quite different showing that the "lines of force" are only an artifact of iron filings being sprinkled onto the paper.
How do you separate iron fillings sand and salt?
Firstly add distilled water to the mixture and heat and stir the solution. Filter the mixture to collect iron and sand as residue and the aqueous solution of salt as the filtrate in a conical flask or beaker. Pour the aq solution of salt into a evaporating dish and evaporate it to dryness. The salt is then obtained. Using a magnet, hover the magnet across the mixture of iron and sand. The iron filings will be attracted to the magnet, separating the iron from sand. The sand remains.
If you are given some iron fillings and a magnet describe how you would find the poles of the magnet?
If possible cover the magnet with a sheet of paper and gently sprinkle the iron filings over the sheet ot paper, they will stick in a pattern following the magnetic "lines of flux" which will get closer and closer near the poles of the magnet. Afterwards you can cleanup by lifting the sheet of paper off of the magnet and the filings will fall away. Without the paper the filings will usually become tightly stuck to the magnet, making it hard to clean.
What is a pole on a magnet?
The poles of a magnet are the ends of the core of the magnet, where the lines of force emerge. An experiment with iron filings shows the lines of force, by putting a sheet of paper over the magnet and sprinkling fine iron filings. This is an easy thing to do at home. For a bar magnet the poles will be at opposite ends. If you have two such magnets you can experiment and find that like poles repel, opposite poles attract.
Is flux visible to human naked eye or not?
Magnetic flux by itself is not visible to the human eye, but they can be seen with a flat, non-magnetic, thin surface. A magnet and some Iron filings. Simply place the magnet under the flat surface (such as a thin sheet of wood) and hold it there. then place the Iron filings above the flat surface and move the magnet a little. you should see the magnetic lines of flux if the magnet is powerful enough.
What happens when metal filings are dropped on a sheet of paper that has a bar magnet beneath the paper?
A bar magnet creates an invisible magnetic field around it, and magnetic metals such as iron are attracted to the magnet. Any metal structure is then included in the magnetic field lines. For iron filings on the sheet of paper, they will group into clusters near the poles, and also form an oval pattern along the length of the magnet, representing the magnetic field lines. The field is bulged outward nearest the center of the magnet's length. This displays the approximate two-dimensional shape of the three-dimensional magnetic field. For a picture, see the related link.
How is the magnetic field around a magnet shown?
Get a decent size magnet. Get some iron filaments and sprinkle the iron filaments around the magnet. You will see the magnetic field of the magnet from the iron filaments lining up from each pole and curving outwards.
What can you infer about magnetic fields and paper?
You can infer nothing about a magnetic field from paper alone, or about paper from a magnetic field. If you put iron filings on a horizontal sheet of paper and put a magnet below the paper, you may be able to visualize the magnetic field of the magnet and thus infer its dipole arrangement.
Why will chalk dust on a plastic sheet placed over a bar magnet not show the shape of the magnetic field?
Chalk dust (calcium carbonate) is not magnetisable.
How do you separate iron fillings sand and salt?
Firstly add distilled water to the mixture and heat and stir the solution. Filter the mixture to collect iron and sand as residue and the aqueous solution of salt as the filtrate in a conical flask or beaker. Pour the aq solution of salt into a evaporating dish and evaporate it to dryness. The salt is then obtained. Using a magnet, hover the magnet across the mixture of iron and sand. The iron filings will be attracted to the magnet, separating the iron from sand. The sand remains.
Electric lines of force never cress Why?
I think you mean "cross". And furthermore I think you mean the old iron filings around a bar magnet demonstration showing "magnetic lines of force". With all this guessing I propose an answer that your teacher won't like either: They don't cross because they don't exist. To prove this-- Sprinkle the iron filings on paper with a magnet beolw the sheet. Notice that they don't move. Photograph it. Do the experiment again. Photgraph this too and compare the two photos. They will be quite different showing that the "lines of force" are only an artifact of iron filings being sprinkled onto the paper.
Does a magnet repell?
yes a magnet repell. Because if you put a piece of sheet it would not do anything but if you have another magnet and you put it on the south and the magnet is south then it will repell
What makes plastic bags?
plastic film or sheet
Why dousn't a magnet move to the North Pole?
It is impossible currently to create a magnet with only one pole, or magnetic monopole. This is because a magnet arises from the magnetic directional alignment of the material, so cutting a bar magnet in half will simply cause the two pieces to become their own bar magnets, both pointing the same way as the original.
