Question

an electron released from rest in uniform electric field of magnitude e=220 n/c and gains speed. find magnitude of force applied to it

Answer 1

The field of magnitude $E$ acts on the point charge $q$ with force $F = q E$. Therefore, $F = 1.6 \cdot 10^{-19} C\cdot 220 \frac{N}{C} \approx 3.5 \cdot 10^{-17} N$.