The two different methods are used because cracks can only be seen 45 to 90 degrees to the magnetic flux lines.
The suit carried her gracefully, effortlessly, across the flux lines.
One of the students asked what the flux lines would look like for a triangular magnet.
The only equation to satisfy is, and that means that all the flux lines must be closed.
Magnetic fields can usually be seen by magnetic flux lines.
The strength of a magnet has to do with the spaces between the magnetic flux lines.
The closer the flux lines are to each other, the stronger the magnet is.
The flux lines can be seen by placing iron filings over a magnet.
In order to map a magnetic field, we look at magnetic flux lines.
It does so through aligning itself with the magnetic flux lines of the earth.
