A solenoid of 500 turns/m is carrying a current of 3 A. Its core is made of iron which has relative permeability 5001. The magnitude of magnetization is

According to Curie's law in magnetism, the correct relation is ( $$\mathrm{M}=$$ magnetization in paramagnetic sample, $$\mathrm{B}=$$ applied magnetic field, $$\mathrm{T}=$$ absolute temperature of the material, $$\mathrm{C}=$$ curie's constant)

A thin rod of length $$L$$ has magnetic moment $$M$$ when magnetised. If rod is bent in a semicircular arc what is magnetic moment in new shape?

The materials suitable for making electromagnets should have