2. structure of atom — Chemistry STD 11 Science — Question

a
An electron moves away from the nucleus, its potential energy increases. The potential energy of the electron is minimum at equilibrium distance from the nucleus. As this distance increases / decreases, its potential energy increases.

Thus, when electron is excited a higher energy orbital it gets farther away from the atom. The further the orbital is from the nucleus, the higher the potential energy of an electron at that energy level.