Obtain the enrgy of joule acquired by an electron beam when accelerated through a potential difference of 2000 V. How much speed will the electron gain ?
A. `(8)/(3)xx10^(7) m//s`
B. `(7)/(3)xx10^(7) m//s`
C. `(5)/(3)xx10^(7) m//s`
D. `(2)/(3) xx 10^(7) m//s`