alnico, an alloy used extensively for permanent magnets contains iron, nickel, a

Question

Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio

Options:

A . 50 : 20 : 20 : 10

B . 40 : 30 : 20 : 10

C . 50 : 20 : 10 : 20

D . 30 : 20 : 30 : 20

Answer: Option A
Explanation :

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