Which of the following figure represents the electric field lines due to a single positive charge?

If the electric flux entering and leaving an enclosed surface respectively is ${\varphi _1}$ and ${\varphi _2}$ the electric charge inside the surface will be

A charge $Q$ is enclosed by a Gaussian spherical surface of radius $R$. If the radius is doubled, then the outward electric flux will

Figure shows the electric lines of force emerging from a charged body. If the electric field at $A$ and $B$ are ${E_A}$ and ${E_B}$ respectively and if the displacement between $A$ and $B$ is $r$ then

Is electric flux scalar or vector ?

Five charges $+q,+5 q,-2 q,+3 q$ and $-4 q$ are situated as shown in the figure.

The electric flux due to this configuration through the surface $S$ is