Question

Nipermag is an alloy of:
a.) Iron, nickel, aluminum, cobalt
b.) Iron, titanium, nickel, cobalt
c.) Iron, nickel, aluminum, titanium
d.) Iron, nickel, cobalt, titanium

Answer 1

Hint: Nipermag is an alloy which is a combination of more than two metals. This alloys is used for making a permanent magnet which can be used in loudspeakers, clocks.
Step by step solution:
We know that alloy is a metal made by combining two or more metallic elements, especially to give greater strength or resistance to corrosion. Many pure metals are too soft for many uses. They can be made harder by adding another element to the pure metal, so forming an alloy.
Examples of alloys are steel, solder, brass, pewter, duralumin, bronze and amalgams.
Metal alloys are used because they typically have enhanced mechanical or chemical properties.
Alloying elements can be added to a metal to increase a number of properties including hardness, strength, corrosion resistance, machinability, and much more.
Alloys like alnico or nipermag are very hard and are used in the production of permanent magnets. Nipermag is an alloy of iron that contains nickel, aluminium and titanium.
So, the correct option is “C”.

Note: A magnetic alloy is a combination of various metals from the periodic table such as ferrite that contains at least one of the three main magnetic elements: iron, nickel or cobalt etc. Such an alloy must contain but is not limited to one or more of these metals.