Gausss Law

A square surface of a side  is in the plane of the paper. A uniform electric field also in the plane of the paper, is limited only to the lower half of the square surface, (see figure). The electric flux in SI units associated with the surface is:
 

1.		2.
3.	zero	4.

A hollow cylinder has a charge coulomb within it (at the geometrical centre). If is the electric flux in units of Volt-meter associated with the curved surface the flux linked with the plane surface in units of volt-meter will be: 

1.
2.
3.
4.

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

1.	be reduced to half
2.	remain the same
3.	be doubled
4.	increase four times

What is the flux through a cube of side if a point charge of is placed at one of its corners?

1.		2.
3.		4.

Two parallel infinite line charges with linear charge densities and are placed at a distance The electric field mid-way between the two line charges is:

1.		2.	zero
3.		4.

If over a surface, then:

1.	the electric field inside the surface is necessarily uniform.
2.	the number of flux lines entering the surface must be equal to the number of flux lines leaving it.
3.	the magnitude of electric field on the surface is constant.
4.	all the charges must necessarily be inside the surface.