Question
the electric field vector is given by E=a(x)½ iˆ.find the flux through a cube bounded by surfaces x=l ,x=2l, y=0 ,y=l, z=0, z=l
Joshi sir comment
entering flux at x=l will be a(l)1/2 * l2
leaving flux at x=2l will be a(2l)1/2 * l2
so net flux will be the difference of these 2 flux