Answer:
The kinetic energy would also be increased by 138 times.
Explanation:
Rest mass of an electron
[tex]mc^2= 9.11\times 10^{-31}\times (3\times 10^8)^2\\\Rightarrow mc^2=8.199\times 10^{-14}[/tex]
Convert to MeV
[tex]8.199\times 10^{-14}\times 6.242\times 10^{12}=0.511 MeV[/tex]
Total energy of the electron = 138×mc² =70.518 MeV
Kinetic energy of an electron
E = mc²
According to the question
E = 138×0.511 MeV = 70.518 MeV
So, the kinetic energy would also be increased by 138 times.
