question_answer

What are dimensions of Planck's constant? What other physical quantity has the same dimensions?

Answer:

                Dimensions of Planck's constant, \[h=kg\,{{m}^{2}}\,{{s}^{-1}}\] Angular momentum\[=m\upsilon r=kg\,(m\,{{s}^{-1}}\,)m=kg\,{{m}^{2}}\,{{s}^{-1}}\] has the same dimensions (Remember from Bohr's postulate,\[m\upsilon r=n\,\frac{h}{2\pi }\])