 Solution

ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2009/ib/paper-2/6a/solution

In SI units, Gauss's law relates the outward electric flux through a closed surface to its enclosed charge:

\int_{S} E \cdot n d S = \frac{Q _{enclosed}}{ε _{0}} .

The outward unit normal specifies the sign of the electric flux.

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