The final kinetic energy of the electrons is [tex]1.92 \times 10^{-14}[/tex]
According to the Special Theory of Relativity, when a particle is in motion with a constant velocity, it is a substantial fraction of the speed of light. To describe the motion of the moving particle, Einstein's special theory of relativity is required.
For the above-given question, it can be solved by using the below mention formula,
K = qV
where:
q is the charge
V is the potential difference
It is given that
V, Voltage difference is of 120 kV = [tex]120 \times 10^{3} V[/tex]
q will be equal to e, q = e = [tex]1.6 \times 10^{-19}[/tex]
[tex]K=120 \times 10^{2} V \times 1.6 \times 10^{-19}=1.92 \times 10^{-14} J[/tex]
