In atomic structure how can be bohr be proved right in accordance with heisenberg uncertainity principle?

Dear Ramendra Ck,

Heisenberg's Uncertainity principle says that it is impossible to measure simultaneously both the postion & velocity(or momentum) of a sub-microscopic particle with absolute accuracy or certainity .

But any one of the two , that is either position or velocity of a sub-microscopic particle(electron) can be predicted accurately at a given time !

Thus Bohr derived the formula for the velocity of an Electron in an n^th orbital to be

Strictly speaking Bohr's theory is wrong. It belongs to what is called the "old quantum theory". One must use Schrodinger's equation and either wave mechanics or Dirac notation. It is well beyond the scope of IITJEE.