Perminvar alloy having constant permeability is an alloy of
a) Nickel, copper and iron
b) Nickel, copper and zinc
c) Copper, nickel and antimony
d) Iron, zinc and bismuth
Perminvar alloy having constant permeability is an alloy of
a) Nickel, copper and iron
b) Nickel, copper and zinc
c) Copper, nickel and antimony
d) Iron, zinc and bismuth