Minimum excitation potential of Bohr's first orbit hydrogen atom is

Options

A. `13.6 V`
B. `3.4 V`
C. `10.2 V`
D. `3.6 V`

Answer

C

Explanation

Excitation potential `= ("Excitation energy")/(e)`
Minimum excitation energy corresponds to excitation from `n = 1` to `n = 2`
`:.` Minimum excitation energy in hydrogen atom
`= - 3.4 -(-13.6) = + 10.2 eV`
so minimum excitation potential `= 10.2 eV`