Physics - Elecrostatics Question with Solution | TestHub

Let${\mathrm{E}}_1\left(\mathrm{r}\right),\mathrm{ }{\mathrm{E}}_2\left(\mathrm{r}\right)$and${\mathrm{E}}_3\left(\mathrm{r}\right)$be the respective electric fields at a distance r from a point charge Q, an infinitely long wire with constant linear charge density$\mathrm{\lambda }$, and an infinite plane with uniform surface charge density$\mathrm{\sigma }$. If${\mathrm{E}}_1\left({\mathrm{r}}_0\right)={\mathrm{E}}_2\left({\mathrm{r}}_0\right)={\mathrm{E}}_3\left({\mathrm{r}}_0\right)$at a given distance${\mathrm{r}}_0$, then