Here are some common ways to visualize magnetic fields:

Using Small Objects Aligning with Fields

Tiny compass needles will orient themselves along the direction of magnetic field lines surrounding a magnet or electromagnet.

Sprinkling iron filings near a magnet causes them to arrange themselves tracing out the pattern of the magnetic field lines, making the field visible.

Magnetic Viewing Films

These specialized films contain suspended nickel flakes in oil that align with magnetic fields.Compared to iron filings, these films provide a cleaner visualization of the magnetic field patterns.

Ferrofluids

Ferrofluids are liquids with tiny ferromagnetic particles suspended in them.When placed near a magnet between transparent surfaces, the particles sharply spike along the 3D magnetic field lines, allowing visualization.

Advanced Imaging Techniques

Technologies like magnetic force microscopy and scanning SQUID microscopy leverage highly sensitive sensors.These techniques enable visualizing magnetic fields with micrometer-level resolution and precision mapping.

The best method depends on the strength of the magnetic fields being visualized.

The stronger the magnets, the stronger the magnetic fields. Neodymium magnets is the strongest magnets available on the market.