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## Main Question or Discussion Point

I am a mechanical engineer and am having to do some calculations concerning magnets and solenoids for a project I am on.

I have a solenoid (defined by number loops, current and cross sectional area).

Inside the solenoid is a rare earth bar magnet of some length, initial mis alignment (degrees). The magnet is only free to rotate. I have the manufactures information for the magnet seen below.

remanence (Br), which measures the strength of the magnetic field = 1.2 teslas

energy product (BHmax), the density of magnetic energy = 300 Kj/m^3

Please any help would be greatly appreciated I have already spent way to much time on this.

Thanks,

I have a solenoid (defined by number loops, current and cross sectional area).

Inside the solenoid is a rare earth bar magnet of some length, initial mis alignment (degrees). The magnet is only free to rotate. I have the manufactures information for the magnet seen below.

remanence (Br), which measures the strength of the magnetic field = 1.2 teslas

energy product (BHmax), the density of magnetic energy = 300 Kj/m^3

**How do I calculate the torque on this magnet when the solenoid is turned on?**I have looked and looked online but I don't know how to convert the manufactures data into a magnetic moment or a magnetic field or anything else I could find of use.Please any help would be greatly appreciated I have already spent way to much time on this.

Thanks,