Eight dipoles of charges of magnitude $e$ are placed inside a cube. The total electric flux coming out of the cube will be

The figure shows the electric field lines of four point charges $A$,$B$,$C$,and $D$. Which charge has the maximum magnitude?

Which of the field patterns given below is valid for an electric field as well as for a magnetic field?

$A$ circular disc of radius $R$ carries surface charge density $\sigma(r) = \sigma_0 \left(1 - \frac{r}{R}\right)$,where $\sigma_0$ is a constant and $r$ is the distance from the center of the disc. Electric flux through a large spherical surface that encloses the charged disc completely is $\phi_0$. Electric flux through another spherical surface of radius $\frac{R}{4}$ and concentric with the disc is $\phi$. Then the ratio $\frac{\phi_0}{\phi}$ is:

How do electric field lines depend on the area or the solid angle subtended by the area?

Draw electric field lines for simple charge distributions.