write an experiment to visualise the magnetic field
Answers
Answer:
The easiest way is to take a small compass and move it around within a magnetic field. The direction the compass points is tangent to the curve of the magnetic field line at any location. A nice tool for this, using a small bar magnet instead of a compass is the following I got from Arbor Scientific.
1. The easiest way is to take a small compass and move it around within a magnetic field. The direction the compass points is tangent to the curve of the magnetic field line at any location. A nice tool for this, using a small bar magnet instead of a compass is the following I got from Arbor Scientific.
2. The next most popular method is to place the magnet (or electromagnet) under a piece of paper or light cardboard. You then sprinkle iron filings on top of the paper, tap the paper a couple of times, and watch the small filings line up along the field lines. You could spray clear Krylon over the pattern, keeping it in place. It is also possible to get tin-plated iron filings. These won't rust. Or, get a plastic box with iron filings in it, and place a magnet under the box. They will trace out the field lines. A variation of this is to use black sand which is simply very small particles of magnetite. Another variation, which isn't as messy, is to use the product, also from Arbor Scientific, called Mysterious Magnet Tube to see the iron filings surround the magnet in the middle. The iron filings stay contained within the cylinder. There are some other variations of this on the market, including having the iron filings suspended in oil.
3. Another method is to take your stapler, make a bunch of staples, and use them like big iron filings. Sprinkle them onto a piece of paper, like you do with the filings, or let them hang around on the magnet itself. A variation of this is to use BB's to do the same thing.
4. The most accurate method is to use a software package that will calculate the field in the space around a magnet or electromagnet and plot the field lines or display shaded areas corresponding to the strength of the field.