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AP Physics C: E&M
8.6 Gauss’s Law
8.5 Electric Flux
BeginnerMCQConceptual14.4k
Spherical and cylindrical surfaces centered on charge q.
Spherical and cylindrical surfaces centered on charge q.
A student analyzes the electric field of an isolated positive point charge \(q\) using Gauss's law. The student considers two closed Gaussian surfaces centered on the charge: a spherical surface of radius \(r\) and a cylindrical surface of radius \(r\) and height \(2r\). Which of the following best explains why the spherical surface easily yields the electric field magnitude \(E\), whereas the cylindrical surface does not?

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