Question

Define electric flux. Write its SI unit. A charge q is enclosed by a spherical surface of radius R. If the radius is reduced to half, how would the electric flux through the surface change ?

Answer 1

Electric flux over an area in an electric field represents the total number of electric lines of force crossing this area. SI unit of electric flux are `N m^(2) C^(-1)`.
When R is reduced to half, electric flux through the surface remains the same. This is because electric flux through the surface .depends only on charge enclosed.