A) \[\mu \propto n\]
B) \[\mu \propto 1/n\]
C) \[\mu \propto {{n}^{2}}\]
D) \[\mu \propto 1/{{n}^{2}}\]
Correct Answer: A
Solution :
From Bohr?s model of atom, electrons can revolve only in those orbits in which their angular momentum is an integral multiple of \[h/2\pi \], where h is Planck?s universal constant. From Bohr?s postulate, \[\mu =\frac{nh}{2\pi }\] \[\Rightarrow \,\,\,\,\,\,\,\mu \propto n\] where n is integer (= 1, 2, 3,...) and is called principal quantum number.
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