1.

Ratio of velocity of electron in 5^(th) excited state and 3^(rd) energy level for He^(+) atom is

Answer»

`(1)/(4)`
`(1)/(6)`
`(1)/(3)`
`(1)/(2)`

SOLUTION :`(V_(6))/(V_(3)) = (Z)/(n_(6)) XX (n_(3))/(Z) = (n_(3))/(Z) = (n_(3))/(n_(6)) = (3)/(6) = (1)/(2)`


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