Total electric flux coming out of a unit positive charge put in air is
${\varepsilon _0}$
$\varepsilon _0^{ - 1}$
${(4p{\varepsilon _0})^{ - 1}}$
$4\pi {\varepsilon _0}$
A charge $Q$ is situated at the comer of a cube, the electric flux passed through all the six faces of the cube is
The black shapes in the figure below are closed surfaces. The electric field lines are in red. For which case, the net flux through the surfaces is non-zero?
The spatial distribution of the electric field due to charges $(A, B)$ is shown in figure. Which one of the following statements is correct
A point charge $+Q$ is positioned at the centre of the base of a square pyramid as shown. The flux through one of the four identical upper faces of the pyramid is
A charged particle $q$ is placed at the centre $O$ of cube of length $L$ $(A\,B\,C\,D\,E\,F\,G\,H)$. Another same charge $q$ is placed at a distance $L$ from $O$.Then the electric flux through $BGFC$ is