A) -3.4eV
B) - 6.8 eV
C) 6.8 eV
D) 3.4 eV
Correct Answer: D
Solution :
Kinetic energy of electron \[K=\frac{Z{{e}^{2}}}{8\pi {{\varepsilon }_{0}}r}\] Potential energy of electron \[U=-\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{Z{{e}^{2}}}{r}\] \[\therefore \] Total energy \[K=K+U=\frac{Z{{e}^{2}}}{8\pi {{\varepsilon }_{0}}}-\frac{Z{{e}^{2}}}{4\pi {{\varepsilon }_{0}}r}\] or \[E=-\frac{Z{{e}^{2}}}{8\pi {{\varepsilon }_{0}}r}\] or \[E=-K\] or \[K=-E=-(-3.4)\] or = 3.4 eV
You need to login to perform this action.
You will be redirected in
3 sec
