Answer:
The velocity of electron is 592999.45 m/s.
Explanation:
Given that,
Electric field = 1000 V/m
Distance = 0.10 cm
(a).We need to calculate the velocity of electron
Using newton's law

...(I)
Now, Using equation of motion


Put the value of a in equation (I)


Put the value into the formula


(b). We need to calculate the velocity of electron
Using work theorem


Here, weight of electron is very less compare to electric field
So, neglect to weight of electron.


Put the value into the formula


Hence, The velocity of electron is 592999.45 m/s.