Question

when an electron is revolving around the nucleus (consisting of protons and neutrons), the
work done by nucleus on the individual electron for one round is :

Answer 1

0 J is the workdone by nucleus

Answer 2

The  answer to the question is 0 .

EXPLANATION:

When the electron revolves around the nucleus, it needs a centripetal force. The centripetal force to the electron is provided by the electrostatic force of attraction between nucleus and electron.

We know that centripetal force acts along the radius and towards the centre.

Hence, the work done by the centripetal force is zero as force is perpendicular to the instantaneous displacement.

We are asked to calculate the work done by the nucleus on individual electron for one round. For one round, the net displacement is zero. Most importantly, electrostatic force is  the centripetal force for which electron revolves around the nucleus.

Hence, the work done by nucleus on  individual electron is zero.