Three charges $q_1 = 1\,\mu c, q_2 = 2\,\mu c$ and $q_3 = -3\,\mu c$ and four surfaces $S_1, S_2 ,S_3$ and $S_4$ are shown in figure. The flux emerging through surface $S_2$ in $N-m^2/C$ is
$36\pi \times10^3$
$-36\pi \times10^3$
$36\pi \times10^9$
$-36\pi \times10^9$
A metallic sphere is kept in between two oppositely charged plates. The most appropriate representation of the field lines is
Which of the following figure represents the electric field lines due to a single positive charge?
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 electric field intensity at $P$ and $Q$, in the shown arrangement, are in the ratio
A cylinder of radius $R$ and length $L$ is placed in a uniform electric field $E$ parallel to the cylinder axis. The total flux for the surface of the cylinder is given by