Derivation of velocity & Energy of Electron in Bohr's Orbit | Hydrogen Spectrum

The energy of an electron in the nth Bohr orbit of hydrogen atom is

The energy of the electron in Bohr's orbit related to n as

Calculate the velocity of electron in Bohr's first orbit of hydrogen atom. How many times does the electron go in Bohr's first orbit in one second ?

The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom, is

The kinetic energy of electron in the first Bohr orbit of the hydrogen atom is

The kinetic energy of the electron in the second Bohr's orbit of a hydrogen atom [ a_(0) is Bohr's radius] is

Calculate the velocity of an electron in the first Bohr orbit of a hydrogen atom