Question

calculate the electric field at one corner of a square 1.7 m on the side if the other three corners are occupied by 3.05*10^-6 C charges

Answer 1

You just need to figure out how far each charge is.

Answer 2

\[ \large
\vec{E} = k_e\sum \frac{q_i}{|\hat{r_i}|^2} \hat{r_i}
\]

Answer 3

For each case \(q_i = 3.05\times 10^{-6}C \) whereas \(\hat{r_1} = 1.7 m\hat{i} \), and \(\hat{r_2} = 1.7 m\hat{j} \), \(\hat{r_3} = 1.7 m\hat{i}+1.7 m\hat{j} \)