A material has N spins per m3. If Np are the dipoles per m3 parallel t – McqOptions

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1.	A material has N spins per m3. If Np are the dipoles per m3 parallel to field and Na are the dipoles per m3 anti-parallel to field, the magnetisation is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» B. [B].

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