A) \[1.632\times {{10}^{-18}}\,\,V\]
B) \[1.612\times {{10}^{-14}}\,\,V\]
C) \[1.619\times {{10}^{-16}}\,\,V\]
D) none of these
Correct Answer: A
Solution :
Energy of electron at the ground state\[{{E}_{1}}=13.6\,\,eV\] Energy of the electron in the first excited state \[{{E}_{2}}=-\frac{13.6}{{{n}^{2}}}eV\] \[=-\frac{13.6}{{{2}^{2}}}=-3.4\,\,eV\] Hence, the energy required to excite the electron \[E={{E}_{2}}-{{E}_{1}}=-3.4-(-13.6)\] \[=10.2\,\,eV\] \[=10.2\times 1.6\times {{10}^{-19}}\] \[=1.632\times {{10}^{-18}}V\]
You need to login to perform this action.
You will be redirected in
3 sec
