$A\to A^{+}e,E_{1}and{A}^{+}\to A^{2+}+e,E_2$.
1. The energy required to pull out the two electrons are $E_1$ and $E_2$ respectively. The correct relationship between two energy would be

Q. Consider the following changes:
$A\to A^{+}+e^{-}:E_1$ and $A^{+}\to A^{2+}+e^{-}:E_2$
The energy required to pull out the two electrons are $E_1$ and $E_2$ respectively. The correct relationship between two energies would be:

Q. Consider the following changes:

Q. In Bohr's atom, energy is absorbed or radiated when an electron makes a transition between two stationary states. If $f$ is the frequency of emitted radiation and $E_1$ and $E_2$ are the energies of electron in two states, then practically which is correct for a hydrogen like atom for the transition as shown in the figure.

Q. If $E_1,E_{2}and{E}_3$ represents the kinetic energy of an electron, an alpha particle and a proton each having same de-Broglie’s wavelength then

Q. The e.m.f of a Daniell cell at $298K$ is $E_1$
$Zn|\underset{\left(0.01M\right)}{ZnS{O}_4}||\underset{\left(1.0M\right)}{CuS{O}_4}|Cu$
When the concentration of $ZnS{O}_4$ is $1.0M$ and that of $CuS{O}_4$ is $0.01M$, the e.m.f changed to $E_2$. What is the relationship between $E_1$ and $E_2$?