equation for magnetic moment is
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The magnetic moment of a given electron because of its orbital motion is 1μB. But due to its spin motion, it will be μB /2.
i.e. Morbital = 
and Mspin = s 
Here μB = Bohr magneton
(i) The value of Bohr magneton μB = eh / 4πm
(ii) μB = 0.93 × 10–23 Amp-m2
(c) Other formulae for magnetic moments:
(i) M = ni r2
(ii) M = eVr/2 = er2ω/2 = er22πf/2 = er2π/T
(iii) e/mJ
(iv) M = nωB
i.e. Morbital = 
and Mspin = s 
Here μB = Bohr magneton
(i) The value of Bohr magneton μB = eh / 4πm
(ii) μB = 0.93 × 10–23 Amp-m2
(c) Other formulae for magnetic moments:
(i) M = ni r2
(ii) M = eVr/2 = er2ω/2 = er22πf/2 = er2π/T
(iii) e/mJ
(iv) M = nωB
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