Ncert Exercises & Solutions

Q 1.19)

A point charge of 2.0 μC is at the center of a cubic Gaussian surface 9.0 cm on edge. What is the net electric flux through the surface?

Net electric flux ( $ϕ$ _Net ) through the cubic surface: $ϕ = \frac{q}{ε_{0}}$

$q = Net charge contained inside the cube$

$= 2 .0 μC = 2 \times 10^{- 6} C$

$∴ ϕ_{Net} = \frac{2 \times 10^{- 6}}{8 .854 \times 10^{- 12}} = 2 .26 \times 10^{5} {Nm}^{2} C^{- 1}$