A point charge of 2.0 μC is at the centre of a cubic Gaussian surface 9.0 cm on edge. What is the net electric flux through the surface?
Net electric flux (ϕNet) through cubic surface is, ϕNet=∈0q ∈0 =8.854×10−12N−1C2m−2 q = Net charge contained inside the cube =2.0μC=2×10−6 ∴ϕNet=8.854×10−122×10−6 =2.26×105Nm2C−1 The net electric flux through the surface is 2.26×105Nm2C−1.
