What is the ratio of radii of orbits corresponding to first excited state and ground state in hydrogen atom?

The ratio of radii of orbits correponding to first and second excited states of hydrogen atom is

The ratio of areas within the electron orbits for the first excited state to the ground state for hydrogen atom is

The ratio of the areas of the orbit for the second excited state to the first excited state for the hydrogen atom is

The ratio of energies of hydrogen atom in its first excited state to third excited state is

Assertion: In the duration electron jumps from fist excited state to ground state in a stationary isolated hydrogen atom, angular momentum of the electron about the nucleus is conserved. Reason: As the electron jumps from first excited state to ground state, in a hydrogen atom, the electrostatic force on electron is always directed twoards the nucleus.

calculate the magnetic dipolemoment corresponding to the motion of the electron in the ground state of a hydrogen atom

The ratio of energies of first two excited states hydrogen atom is