A particle of mass \( m \) moves in a circular orbit in a central potential field \( U(r)=U_{0} ...

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A particle of mass \( m \) moves in a circular orbit in a central potential field \( U(r)=U_{0} r^{4} \). If Bohrs quantization conditions are applied, radii of possible orbitals \( r_{n} \) vary with, \( n^{\frac{1}{\alpha}} \) where \( \alpha \) is:
(1) 2
(2) 3
(3) 1
(4) 4
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