When an electron is excited to `n^(th)` energy state in hydrogen, the possible number of spectral lines emitted are

When an electron is excited to n^(th) energy state in hydrogen , the posssible number of spectral lines emitted are

An electron makes transition form n=3 , n=1 state in a hydrogen atom. The maximum possible number of photons emitted will be

If each hydrogen atom is excited by giveng 8. 4 eV of energy , then the number fo spectral lines emeitted si equal to :

A hydrogen atom is excited up to 9th level. The total number of possible spectral lines emitted by the hydrogen atom is

Atomic hydrogen is excited to the nth energy level . The maximum number of spectral lines which it can emit while returning to ground state,is: