Around the perimeter of a closed loop, there is no field lines enclosed through the surface.
Gauss law cannot be evaluated around the perimeter of a closed-loop.
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
where ε0 = 8.85 x 10-12 C2/(N • m2) is the permittivity of vacuum.
How should the integral in Gauss's law be evaluated?
a) around the perimeter of a closed loop
b) over the surface bounded by a closed loop
c) over a closed surface
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