A closed surface encloses a charge q = 3.54 nC. The total flux through the surface is
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 400 Nm2C−1
By Gauss’s law, the total electric flux through any closed surface depends only on the charge enclosed, not on the shape or size of the surface.
\( \displaystyle \phi = \frac{q}{\varepsilon_0} \)
\( \displaystyle \phi = \frac{3.54\times10^{-9}\,\mathrm{C}}{8.85\times10^{-12}\,\mathrm{C^{2}\,N^{-1}\,m^{-2}}} \)
\( \displaystyle \phi = 400\,\mathrm{N\,m^{2}\,C^{-1}} \)