An electron of charge 1.6 x 10¹⁹C is accelerated in vacuum from rest at zero volt towards a plate of 40KV. Calculate the kinetic energy of the electron.

• A 4 x 10 ²⁵J
• B 4 x 10²¹ J
• C 6.4 x 10²⁰ J
• D 6.4 x 10^-15 J
• E 2.5 x 10²⁰ J