We accelerate electrons between two parallel plates a few cm apart. We apply2.1

Question

We accelerate electrons between two parallel plates a few cm apart. We apply2.1 MV across the plates. When an electron begins at rest at one plate, it arrives at the other plate with a kinetic energy of [05] MeV. (a) Find the velocity of the electron. (b) Find the momentum of the electron. (c) The electric field between the plates is equal to 2.15 MV/m. This produces a constant force of 3.44 x 10^-13 N on the electron as it travels from one plate to the other. Find the amount of time it takes for the electron to travel from one plate to the other. Remember that the force is the time derivative of the momentum.

Explanation / Answer

mass of electron m =9.11x10^-31 kg

Charge of an electron =-1.60x10^-19 C

a)Mev=1.60217657

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