Question

Assertion: the magnetic moment () of an electron revolving around the nucleus decreases with increasing principle quantum number (n).

Answer 1

So consider the Bohr Atomic Model. As you can see in the picture below, the negatively charged electrom revolves in a circular orbit of radius rraround a positively charged nucleus. Since the electron revolves in a closed path, it’s motion constitutes an electric current. The electron, by virtue of it’s counter-clockwise motion produces conventional current in the clockwise direction.