Question

what are ferrous and non ferrous

Answer 1

ferrous-metals which can be made in electromagnets
non ferrous-metals which cant be made into electromagnets

Answer 2

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ferrous and non-ferrous metals is in their iron content. Both types may be pure or alloys. In general, ferrous metals contain iron. ... Stainless steel is a common form of ferrous metal. Non-ferrous metals, on the other hand, do not contain any iron.

Well known ferrous metals include copper, lead, zinc, aluminium, tin, nickel, gold, silver and platinum. Because non-ferrous metals are very malleable they are more suited to for use where weight is an important factor. For example, in aircraft manufacture the materials must be strong but also as light as possible.