GEOLOGY

Detailed explanation-1: -Examples of non-magnetic materials include almost all nonmetals like rubber, feather, leather, etc, and some metals like tin, aluminum, copper, lead, zinc, etc.

Detailed explanation-2: -Even though zinc is a nonmagnetic metal, the coating is so thin that the magnetic properties of the steel are not hindered. Since ferrous metals are prone to rust, galvanized steel is an excellent selection for projects that require magnetic properties in corrosive environments.

Detailed explanation-3: -Cobalt, iron and nickel are attracted to a magnet. Hence, they are magnetic materials. Whereas, plastic can neither be magnetised nor it gets attracted to a magnet. Thus, it is a non-magnetic material.

Detailed explanation-4: -The materials which are not attracted by a magnet are called non – magnetic materials such as aluminum, copper, plastic, wood, etc.

Detailed explanation-5: -Zinc is diamagnetic but cobalt and iron are soft ferromagnetic materials. Therefore, in the absence of an external magnetic field, the remanent magnetic moment for Co or Fe particles is very small and they create little or no stray magnetic field.