question_answer

The radius of the second Bohr orbit for hydrogen atom is: (Plank's const. \[\text{h}\,\text{=}\,\text{6}\text{.6262}\times \text{1}{{\text{0}}^{-34}}\,Js;\]mass of electron\[=9.1091\times {{10}^{-31}}\,kg;\]charge of electron \[e=1.60210\times {{10}^{-19}}C;\]permittivity of vaccum\[{{\in }_{0}}=8.854185\times {{10}^{-12}}\,k{{g}^{-1}}{{m}^{-3}}{{A}^{2}})\]                                                  JEE Main Solved Paper-2017

A)  \[1.65\overset{\text{o}}{\mathop{\text{A}}}\,\]                            

B) \[4.76\overset{\text{o}}{\mathop{\text{A}}}\,\]

C) \[0.529\overset{\text{o}}{\mathop{\text{A}}}\,\]                           

D) \[212\overset{\text{o}}{\mathop{\text{A}}}\,\]