A point charge 25 μC is located in the XY-plane at the point of position vector $\overrightarrow{{\mathrm{r}}_0}=\left(\hat{\mathrm{i}}+\hat{\mathrm{j}}\right)\mathrm{m}$. What is the magnitude of electric field at the point of position vector $\overrightarrow{{\mathrm{r}}_1}=\left(4\hat{\mathrm{i}}+5\hat{\mathrm{j}}\right)\mathrm{m}$?

• A

  900 V/m

• B

  9 kV/m

• C

  90 V/m

• D

  Can't be determined