Question

4. Which alloy of the metals are used to make artificial magnets?
a. Neodynium and Magnetite
b. Neodynium and Siderite
c. Neodynium and Samarium
d. Neodynium and Hematite​

Answer 1

Answer:

Alnico is commnly used make artificial magnet. it is an acronym referring to a family of iron alloys which in addition to iron are composed primarily of aluminium (Al), nickel (Ni) and cobalt (Co), hence al-ni-co. They also include copper, and sometimes titanium.

Answer 2

Neodynium and Samarium