NEET Physics MCQs

Energy of electron in an orbit of $H$-atom is

What will be the angular momentum of an electron, if energy of this electron in $H$-atom is $- 1.5\,\,eV$ (in $J$-$s$)

What will be the angular momentum of an electron, if energy of this electron in $H$-atom is $- 1.5\,\,eV$ (in $J$-$s$)

The minimum energy required to excite a hydrogen atom from its ground state is

An electron in the $n = 1$ orbit of hydrogen atom is bounded by $13.6\,\,eV$. Energy requires to ionize it is

An electron in the $n = 1$ orbit of hydrogen atom is bounded by $13.6\,\,eV$. Energy requires to ionize it is

The electron in the hydrogen atom jumps from excited state $\left( {n = 3} \right)$ to its ground state $\left( {n = 1} \right)$ and the photons thus emitted irradiate a photosensitive material. If the work function of the material is $5.1\,\,{\rm{eV}}$, the stopping potential is estimated to be (the energy of the electron in ${n^{th}}$ state${E_n} = - \frac{{13.6}}{{{n^2}}}\,eV$)

The electron in the hydrogen atom jumps from excited state $\left( {n = 3} \right)$ to its ground state $\left( {n = 1} \right)$ and the photons thus emitted irradiate a photosensitive material. If the work function of the material is $5.1\,\,{\rm{eV}}$, the stopping potential is estimated to be (the energy of the electron in ${n^{th}}$ state${E_n} = - \frac{{13.6}}{{{n^2}}}\,eV$)

Energy $E$ of a hydrogen atom with principal quantum number n is given by $E = \frac{{ - 13.6}}{{{n^2}}}eV$. The energy of a photon ejected when the electron jumps from $n = 3$ state to $n = 2$ state of hydrogen is approximately

How much work must be done to pull apart the electron and the proton that make up the Hydrogen atom, if the atom is initially in the state with $n = 2$