Mastering Physics: Gauss's Law

Mastering Physics: Gauss's Law

To understand the meaning of the variables in Gauss's law, and the conditions under which the law is applicable.Gauss's law is usually written ΦE=∮E⃗ ⋅dA⃗ =q_encl/ϵ_0,where ϵ_0=8.85×10^(-12) C^2/(N⋅m^2) is the permittivity of vacuum.

Part A

Question: How should the integral in Gauss's law be evaluated?

Answer: over a closed surface

Part B

Question: In Gauss's law, to what does q_encl refer?

Answer: the net charge inside the closed surface