An electron and a proton starting from rest get accelerated through potential difference of 100 kV. The final speed of the electron and the proton are Ve and Vp respectively. Which of the following relations is correct?

Answer: Option A

Both when accelerated through a potential difference of 100 kV, they will have the same energy. The mass of the electron is less than the mass of a proton, hence it will move faster(momentum).