In the figure, a very large plane sheet of positive charge is shown. $P _{1}$ and $P _{2}$ are two points at distance $l$ and $2 \,l$ from the charge distribution. If $\sigma$ is the surface charge density, then the magnitude of electric fields $E_{1}$ and $E_{2}$ at $P _{1}$ and $P _{2}$ respectively are
$E _{1}=\sigma / \varepsilon_{0}, E _{2}=\sigma / 2 \varepsilon_{0}$
$E _{1}=2 \sigma / \varepsilon_{0}, E _{2}=\sigma / \varepsilon_{0}$
$E _{1}= E _{2}=\sigma / 2 \varepsilon_{0}$
$E _{1}= E _{2}=\sigma / \varepsilon_{0}$
According to Gauss’ Theorem, electric field of an infinitely long straight wire is proportional to
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