Question

An electron enters between two horizontal plates separated by `2 mm` and having a potential difference of `1000V`. The force on electron is
A. `8 xx 10^(-12) N`
B. `8 xx 10^(-14) N`
C. `8 xx 10^(-9) N`
D. `8 xx 10^(14) N`

Answer 1

Correct Answer - B
Force on electron `F = QE = Q ((V)/(d))`
`rArrF = (1.6 xx 10^(-19)) ((1000)/(2 xx 10^(-3))) = 8 xx 10^(-14)N`