An example for soft magnet is ___________.

45

permalloy

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C r O_{2}

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F e - P d

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Alnico

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Solution

The correct option is A $45$ permalloy
Permalloy is a term for a nickel iron magnetic alloy. It is used in transformer laminator and magnetic recording head sensor. Permalloy is valuable designated by numerical prefix denoting the percentage of nickel alloy.

$45$ Permalloy is an example for this it contains $45$ nickel and $55$ iron.

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F e^{2 +} \to F e^{3 +} + e^{-}

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