List of top Physics Questions on Bohr's model of hydrogen atom asked in AP EAPCET

In hydrogen atom, if the kinetic energy of an electron in an orbit having angular momentum $2h/\pi$ is E, then the potential energy of the electron in the first orbit of hydrogen atom is:

The ratio of radii of \(3^{rd}\) and \(6^{th}\) Bohr's orbit in a hydrogen atom is