Electric Flux

An infinite line charge is at the axis of a cylinder of length 1 m and radius 7 cm. If electric field at any point on the curved surface of cylinder is 250" NC"^(-1) , then net electric flux through the cylinder is

Assertion: In a region where uniform electric field exists, the net charge with in volume of any size is zero. Reason: The electric flux within any closed surface in region of uniform electirc field is zero.

The flux of electric field through the circular region of radius r as shown in the figure is

A surface enclosed an electric dipole, the flux through the surface is -