question_answer 34)

    The gyro-magnetic ratio of an electron in an H-atom, according to Bohr model, is (a) independent of which orbit it is in (b) negative         (c) positive (d) increases with the quantum number n

Answer:

     (a,b)Consider the electron of mass m, charge e be revolving in th orbit of hydrogen atom. According to Bohr's theory angular momentum of electron (L) = . Magnetic moment of electron, M = n x Bohr magneton = Gyromagnetic ratio = a constant   As value of e is negative, so geomagnetic ratio is negative.