1.

In a hydrogen atom, an electron of mass m and charge e revolves in an orbit of radius r making n revolutions per second. If the mass of hydrogen nucleus is M, the magnetic moment associated with the orbital motion of electron is

Answer»

`(pi N E R^(2) m)/(M+m)`
`pi n e r^(2)`
`(pi n e r^(2))/m`
`(pi n e r^(2)m)/M`

ANSWER :B


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