Hi


I am designing a solenoid to interact with a magnetite-powder tip. I can't find specifications about the magnetite I am using, and properties seem to depend on factors I don't know. Could you give me a rough estimate (just order of magnitude is fine) of the force give a certain magnetic field B of the solenoid and a tip of area pi*(0.2mm)^2 covered in magnetite powder?


Thank you
Cristina