the areas of cross section of three magnets of same length area A,2A,6A rsp what will be the ratio - Physics - Moving Charges And Magnetism

Question

the areas of cross section of three magnets of same length area
A,2A,6A rsp what will be the ratio of their magnetic moments

Vara · Accepted Answer

Magnetic moment:M=m2LAs length=constant,M1:M2:M3=m1:m2:m3But, pole strentth is proportional to area of cross-sectionHence,M1:M2:M3=A1:A2:A3                   =A:2A:6A                   =1:2:6

the areas of cross section of three magnets of same length area A,2A,6A rsp. what will be the ratio of their magnetic moments