An
alloy of nickel and iron that is easily magnetised and demagnetised and can
also be used in electrical equipment is :
Supermalloy
Permalloy
Alnico
Cunife
Permalloy
Permalloy is a nickel-iron magnetic alloy, with about 80% nickel and 20% iron content. It is very high magnetic permeability, which makes it useful as a magnetic core material in electrical and electronic equipment, and also in magnetic shielding to block magnetic fields.
Hence,
the correct option is (B).
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