Problem

Find out the following : (a) The velocity of electron in first Bohr's orbit of H-atom (

r = a_0

). (b) de Broglie wave length of the electron in first Bohr's orbit of H-atom. (c) The orbital angular momentum of

2p

-orbitals in terms of

\frac{h}{2\pi}

units. (IIT 2005)