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- Is it possible to make rough calculations to calculate the force that a parmanent magnet exert on a small particle?

Dear readers,

I have a question regarding permanent magnets and the force they generate on particles, which is far from my comfort zone. I have the option on using two types of permanent magnets and with two different setups. Imagine that we want to attract small particles using the magnets. Assume that the same particle is placed on the same distance from both magnets, let's say 10 mm.

I would like to get a rough estimate to compare, i.e. is the force 2 or 3 times higher? Any advice on how I can reason or what equations I can look into?

I have a question regarding permanent magnets and the force they generate on particles, which is far from my comfort zone. I have the option on using two types of permanent magnets and with two different setups. Imagine that we want to attract small particles using the magnets. Assume that the same particle is placed on the same distance from both magnets, let's say 10 mm.

- A magnet with 12 000 Gauss with given dimensions put directly in the vicinity of the particles
- A magnet with 12 000 Gauss with given dimensions (the magnet is smaller in size compared to 1), but around the magnet there is a thin air pocket (lets say 0.1mm around the magnet) and then also a casing of stainless steel of 0.1mm.

I would like to get a rough estimate to compare, i.e. is the force 2 or 3 times higher? Any advice on how I can reason or what equations I can look into?