Solve this:
9. The angular speed of electron in the n th orbit of hydrogen atom is
(1) Directly proportional to n2
(2) Directly proportional to n
(3) Inverse proportional to n3
(4) Inversely proportional to n
Since v is inversely proportional to n and r is directly proportional to n2. Since omega is v/r. Hence omega is inversely proportional to n3.