Which among these materials have a relative permeability of 1?i. Airii – McqOptions

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1.	Which among these materials have a relative permeability of 1?i. Airii. Copperiii. Ironiv. Nickel
A.	i and ii only
B.	i and iii only
C.	i and iv only
D.	iii and iv only
Answer» B. i and iii only

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