Q. A negatively charged plate has charge density of $2 \times 10^{- 6}C/m^{2}.$ The initial distance of an electron which is moving towards the plate, cannot strike the plate, if it is having energy of $200eV$
A) $1.77\ mm$
B) $3.51\ mm$
C) $1.77\ cm$
D) $3.51\ cm$
Explanation
The correct answer is Option A: $1.77\ mm$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.