According to Gauss’s law, the electric flux Φ through a closed surface is given by:
,
where qin is the total charge enclosed by the surface.
In this problem, the charges enclosed by the surface are .
Thus, the electric flux is:
.
The correct answer is Option (2).
A line charge of length is kept at the center of an edge BC of a cube ABCDEFGH having edge length . If the density of the line is per unit length, then the total electric flux through all the faces of the cube will be : (Take as the free space permittivity)
Two charges of and are situated at the points and respectively. The electric flux through a sphere of radius having its center at the origin is: