# Can we create a electric field without actually using a battery or power source?

Can we create an electric field without actually using a battery or a source of electricity? Like a take 2 panels, one is positively charged and another is negatively charged and put them parallel to each other. Will it create a electric field? Thanks. Regards, Bhavesh

• You just need charges and you are done.
– Paul
Mar 18 '15 at 11:37

$\textbf{E} = {Q \over 4\pi \epsilon_0\textbf{r}^2}\hat{\textbf{r}}$
where $\textbf{E}$ is the vector electric field, Q the charge of the object in question, $\epsilon_0$ the permittivity of vacuum or the electric constant, $\textbf{r}$ the vector position of the point in question relative to the charged object in question.
• @Bhavesh The positive charge is sufficient to control the movement of electrons. It is indeed true that the electric field will be stronger though, because then the total field strength would be the sum of two vectors, one has a positive magnitude towards a certain direction and the other one has a "negative magnitude towards the opposite direction"$\equiv$"positive magnitude towards the same direction" Mar 18 '15 at 17:44