In a p-n junction the depletion region is $200 nm$ wide and a electric field of $10^6 vm^{-1}$ exists in it. What is the minimum kinetic energy of conducting electron to diffuse through the barriers.

Question

$(a)\;0.1 \;ev \\ (b)\;1\;ev \\ (c)\;0.2 \;ev \\ (d)\;2 ev$