What is the work done by the field of a nucleus in a complete circular orbit of the electron ? What if the orbit is elliptical ?

What is the work done by the field of a necleus in a complete circular orbit of the electron? What if the orbit is elliptical?

What is the work by the field of a nucleus in a complete circular orbit of the electron and if the orbit is elliptical ?

In the following question a statement of assertion (A) is followed by a statement of reason (R ) A : work done by the field of a nucleus in a complete orbit of the electron is zero even if the orbit is elliptical . R : Electrostatic force is conservative in nature.

The work done by a satellite in a complete orbit is

The work done by a satellite in a complete orbit is

Who proposed that the orbits of the electron in the atom are elliptical ?