Here is this plot using the compass with a small red bar magnet (shown above). How do you find the magnetic dipole moment from that plot? You can't do it very easily.

Detecting magnetic fields A magnetic field is invisible, but it can be detected using a magnetic compass. A compass contains a small bar magnet on a pivot so that it can rotate.

Take two bar magnets and bring their north poles together. What happens? They repel each other: Like poles repel and opposite poles attract. Now go get a magnetic compass. The north pole of the ...

The video explains the concepts of magnetic, electric, and gravitational fields using simple demonstrations. It shows how iron filings reveal the magnetic field around a magnet, how charged ...

How it works A compass points north because all magnets have two poles , a north pole and a south pole, and the north pole of one magnet is attracted to the south pole of another magnet.