Q1: Which of the following is not a ferromagnetic material ?

ANS:C - Aluminium

Aluminium is a non-ferrous metal that is not ferromagnetic. This means that it is not strongly attracted to magnets and does not retain magnetism after the magnetic field is removed. Unlike ferromagnetic materials such as iron, nickel, and cobalt, aluminium does not have a permanent magnetic moment and does not exhibit significant magnetic properties under normal conditions. Aluminium is a highly versatile metal with a wide range of applications due to its lightweight, corrosion resistance, and excellent conductivity. It is commonly used in various industries, including aerospace, automotive, construction, electronics, and packaging. However, its non-ferromagnetic nature makes it unsuitable for applications where magnetic properties are required, such as in magnetic storage devices or electromagnets.