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Paramagnetism: consider a solid in which J= ½ (m= ½ and -2)
(N=n1 + n2). Then, when a magnetic field (H) is applied, the
energy €l= -pH and €2= +pH. The average energy at T = o is
a.
- 0.65 Ne
O b. - Ne
d.
- 0.5 Ne

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