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Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio _____________________?
Mechanical Engineeringmedium
50 : 20 : 20 : 10
B40 : 30 : 20 : 10
C50 : 20 : 10 : 20
D30 : 20 : 30 : 20 E. 50 : 10 : 20 : 20
Correct Answer: A. 50 : 20 : 20 : 10
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