Question

Two charges 4q and q are kept 2m apart. Find the point at which net electric field is zero.

Answer 1

Dear student

$$\begin{gathered} Twocharges4qandqarekeptat2m \\ Soatpointwherenetelectricfieldiszerowillbe \\ \frac{K\times 4q}{r^2}=\frac{K\times q}{(2-r{)}^2} \\ 4=\frac{r^2}{(2-r{)}^2} \\ 2=\frac{r}{2-r} \\ r=4-2r \\ 3r=4 \\ r=4/3m \\ soitisthepoint4/3mfromthecharge4q \\ Regards \end{gathered}$$