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(C) The electric field due to a single infinite sheet with surface charge density $\sigma$ is given by $E = \frac{\sigma}{2\varepsilon_0}$.For two par

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(C) The electric field due to a single infinite sheet with surface charge density $\sigma$ is given by $E = \frac{\sigma}{2\varepsilon_0}$.For two parallel sheets with the same surface charge density $\sigma$ and like charges,the electric fields produced by each sheet at a point between them point in opposite directions.Let the first sheet be on the left and the second on the right. The field from the left sheet points to the right $(E_1 = \frac{\sigma}{2\varepsilon_0})$,and the field from the right sheet points to the left $(E_2 = \frac{\sigma}{2\varepsilon_0})$.The net electric field $E_{net} = E_1 - E_2 = \frac{\sigma}{2\varepsilon_0} - \frac{\sigma}{2\varepsilon_0} = 0$.

The electric field intensity at a point between two parallel sheets with like charges of the same surface charge density $(\sigma)$ is:

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